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• ??11.2 RAC??OCR?Votedisk??ASM Diskgroup?????

  - by Liu Maclean(???)

  ????????Oracle Allstarts??????????ocr?votedisk?ASM diskgroup??11gR2 RAC cluster?????????,????«?11gR2 RAC???ASM DISK Path????»??????,??????CRS??????11.2??ASM???????, ????????????”crsctl start crs -excl -nocrs “; ?????????,??ASM????ocr?????votedisk?????,??11.2????ocr?votedisk???ASM?,?ASM???????ocr?votedisk,?????ocr?votedisk????????cluter??????;???????????CRS????,?????diskgroup??????????,?????????????????? ??:?????????????????ASM LUN DISK,???OCR?????,????????4??????????,???????$GI_HOME,?????????;????votedisk?? ????: ??dd????ocr?votedisk??diskgroup header,??diskgroup corruption: 1. ??votedisk? ocr?? [root@vrh1 ~]# crsctl query css votedisk ## STATE File Universal Id File Name Disk group -- ----- ----------------- --------- --------- 1. ONLINE a853d6204bbc4feabfd8c73d4c3b3001 (/dev/asm-diskh) [SYSTEMDG] 2. ONLINE a5b37704c3574f0fbf21d1d9f58c4a6b (/dev/asm-diskg) [SYSTEMDG] 3. ONLINE 36e5c51ff0294fc3bf2a042266650331 (/dev/asm-diski) [SYSTEMDG] 4. ONLINE af337d1512824fe4bf6ad45283517aaa (/dev/asm-diskj) [SYSTEMDG] 5. ONLINE 3c4a349e2e304ff6bf64b2b1c9d9cf5d (/dev/asm-diskk) [SYSTEMDG] Located 5 voting disk(s). su - grid [grid@vrh1 ~]$ ocrconfig -showbackup PROT-26: Oracle Cluster Registry backup locations were retrieved from a local copy vrh1 2012/08/09 01:59:56 /g01/11.2.0/maclean/grid/cdata/vrh-cluster/backup00.ocr vrh1 2012/08/08 21:59:56 /g01/11.2.0/maclean/grid/cdata/vrh-cluster/backup01.ocr vrh1 2012/08/08 17:59:55 /g01/11.2.0/maclean/grid/cdata/vrh-cluster/backup02.ocr vrh1 2012/08/08 05:59:54 /g01/11.2.0/grid/cdata/vrh-cluster/day.ocr vrh1 2012/08/08 05:59:54 /g01/11.2.0/grid/cdata/vrh-cluster/week.ocr PROT-25: Manual backups for the Oracle Cluster Registry are not available 2. ??????????clusterware ,OHASD crsctl stop has -f 3. GetAsmDH.sh ==> GetAsmDH.sh?ASM disk header????? ????????,????????asm header [grid@vrh1 ~]$ ./GetAsmDH.sh ############################################ 1) Collecting Information About the Disks: ############################################ SQL*Plus: Release 11.2.0.3.0 Production on Thu Aug 9 03:28:13 2012 Copyright (c) 1982, 2011, Oracle. All rights reserved. SQL> Connected. SQL> SQL> SQL> SQL> SQL> SQL> SQL> 1 0 /dev/asm-diske 1 1 /dev/asm-diskd 2 0 /dev/asm-diskb 2 1 /dev/asm-diskc 2 2 /dev/asm-diskf 3 0 /dev/asm-diskh 3 1 /dev/asm-diskg 3 2 /dev/asm-diski 3 3 /dev/asm-diskj 3 4 /dev/asm-diskk SQL> SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options -rw-r--r-- 1 grid oinstall 1048 Aug 9 03:28 /tmp/HC/asmdisks.lst ############################################ 2) Generating asm_diskh.sh script. ############################################ -rwx------ 1 grid oinstall 666 Aug 9 03:28 /tmp/HC/asm_diskh.sh ############################################ 3) Executing asm_diskh.sh script to generate dd dumps. ############################################ -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_1_0.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_1_1.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_2_0.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_2_1.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_2_2.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_3_0.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_3_1.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_3_2.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_3_3.dd -rw-r--r-- 1 grid oinstall 1048576 Aug 9 03:28 /tmp/HC/dsk_3_4.dd ############################################ 4) Compressing dd dumps in the next format: (asm_dd_header_all_.tar) ############################################ /tmp/HC/dsk_1_0.dd /tmp/HC/dsk_1_1.dd /tmp/HC/dsk_2_0.dd /tmp/HC/dsk_2_1.dd /tmp/HC/dsk_2_2.dd /tmp/HC/dsk_3_0.dd /tmp/HC/dsk_3_1.dd /tmp/HC/dsk_3_2.dd /tmp/HC/dsk_3_3.dd /tmp/HC/dsk_3_4.dd ./GetAsmDH.sh: line 81: compress: command not found ls: /tmp/HC/*.Z: No such file or directory [grid@vrh1 ~]$ 4. ??dd ?? ??ocr?votedisk??diskgroup [root@vrh1 ~]# dd if=/dev/zero of=/dev/asm-diskh bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00423853 seconds, 247 MB/s [root@vrh1 ~]# dd if=/dev/zero of=/dev/asm-diskg bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0045179 seconds, 232 MB/s [root@vrh1 ~]# dd if=/dev/zero of=/dev/asm-diski bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00469976 seconds, 223 MB/s [root@vrh1 ~]# dd if=/dev/zero of=/dev/asm-diskj bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00344262 seconds, 305 MB/s [root@vrh1 ~]# dd if=/dev/zero of=/dev/asm-diskk bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0053518 seconds, 196 MB/s 5. ????????????HAS [root@vrh1 ~]# crsctl start has CRS-4123: Oracle High Availability Services has been started. ????ocr?votedisk??diskgroup??,??CSS???????,???????: alertvrh1.log [cssd(5162)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /g01/11.2.0/grid/log/vrh1/cssd/ocssd.log 2012-08-09 03:35:41.207 [cssd(5162)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /g01/11.2.0/grid/log/vrh1/cssd/ocssd.log 2012-08-09 03:35:56.240 [cssd(5162)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /g01/11.2.0/grid/log/vrh1/cssd/ocssd.log 2012-08-09 03:36:11.284 [cssd(5162)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /g01/11.2.0/grid/log/vrh1/cssd/ocssd.log 2012-08-09 03:36:26.305 [cssd(5162)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /g01/11.2.0/grid/log/vrh1/cssd/ocssd.log 2012-08-09 03:36:41.328 ocssd.log 2012-08-09 03:40:26.662: [ CSSD][1078700352]clssnmReadDiscoveryProfile: voting file discovery string(/dev/asm*) 2012-08-09 03:40:26.662: [ CSSD][1078700352]clssnmvDDiscThread: using discovery string /dev/asm* for initial discovery 2012-08-09 03:40:26.662: [ SKGFD][1078700352]Discovery with str:/dev/asm*: 2012-08-09 03:40:26.662: [ SKGFD][1078700352]UFS discovery with :/dev/asm*: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskf: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskb: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskj: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskh: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskc: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskd: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diske: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskg: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diski: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Fetching UFS disk :/dev/asm-diskk: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]OSS discovery with :/dev/asm*: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Handle 0xdf22a0 from lib :UFS:: for disk :/dev/asm-diskf: 2012-08-09 03:40:26.665: [ SKGFD][1078700352]Handle 0xf412a0 from lib :UFS:: for disk :/dev/asm-diskb: 2012-08-09 03:40:26.666: [ SKGFD][1078700352]Handle 0xf3a680 from lib :UFS:: for disk :/dev/asm-diskj: 2012-08-09 03:40:26.666: [ SKGFD][1078700352]Handle 0xf93da0 from lib :UFS:: for disk :/dev/asm-diskh: 2012-08-09 03:40:26.667: [ CSSD][1078700352]clssnmvDiskVerify: Successful discovery of 0 disks 2012-08-09 03:40:26.667: [ CSSD][1078700352]clssnmCompleteInitVFDiscovery: Completing initial voting file discovery 2012-08-09 03:40:26.667: [ CSSD][1078700352]clssnmvFindInitialConfigs: No voting files found 2012-08-09 03:40:26.667: [ CSSD][1078700352](:CSSNM00070:)clssnmCompleteInitVFDiscovery: Voting file not found. Retrying discovery in 15 seconds ?????ocr?votedisk??diskgroup?????: 1. ?-excl -nocrs ????cluster,??????ASM?? ????CRS [root@vrh1 vrh1]# crsctl start crs -excl -nocrs CRS-4123: Oracle High Availability Services has been started. CRS-2672: Attempting to start 'ora.mdnsd' on 'vrh1' CRS-2676: Start of 'ora.mdnsd' on 'vrh1' succeeded CRS-2672: Attempting to start 'ora.gpnpd' on 'vrh1' CRS-2676: Start of 'ora.gpnpd' on 'vrh1' succeeded CRS-2672: Attempting to start 'ora.cssdmonitor' on 'vrh1' CRS-2672: Attempting to start 'ora.gipcd' on 'vrh1' CRS-2676: Start of 'ora.cssdmonitor' on 'vrh1' succeeded CRS-2676: Start of 'ora.gipcd' on 'vrh1' succeeded CRS-2672: Attempting to start 'ora.cssd' on 'vrh1' CRS-2672: Attempting to start 'ora.diskmon' on 'vrh1' CRS-2676: Start of 'ora.diskmon' on 'vrh1' succeeded CRS-2676: Start of 'ora.cssd' on 'vrh1' succeeded CRS-2679: Attempting to clean 'ora.cluster_interconnect.haip' on 'vrh1' CRS-2672: Attempting to start 'ora.ctssd' on 'vrh1' CRS-2681: Clean of 'ora.cluster_interconnect.haip' on 'vrh1' succeeded CRS-2672: Attempting to start 'ora.cluster_interconnect.haip' on 'vrh1' CRS-2676: Start of 'ora.ctssd' on 'vrh1' succeeded CRS-2676: Start of 'ora.cluster_interconnect.haip' on 'vrh1' succeeded CRS-2672: Attempting to start 'ora.asm' on 'vrh1' CRS-2676: Start of 'ora.asm' on 'vrh1' succeeded 2.???ocr?votedisk??diskgroup,??compatible.asm???11.2: [root@vrh1 vrh1]# su - grid [grid@vrh1 ~]$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.3.0 Production on Thu Aug 9 04:16:58 2012 Copyright (c) 1982, 2011, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL> create diskgroup systemdg high redundancy disk '/dev/asm-diskh','/dev/asm-diskg','/dev/asm-diski','/dev/asm-diskj','/dev/asm-diskk' ATTRIBUTE 'compatible.rdbms' = '11.2', 'compatible.asm' = '11.2'; 3.?ocr backup???ocr??ocrcheck??: [root@vrh1 ~]# ocrconfig -restore /g01/11.2.0/grid/cdata/vrh-cluster/backup00.ocr [root@vrh1 ~]# ocrcheck Status of Oracle Cluster Registry is as follows : Version : 3 Total space (kbytes) : 262120 Used space (kbytes) : 3180 Available space (kbytes) : 258940 ID : 1238458014 Device/File Name : +systemdg Device/File integrity check succeeded Device/File not configured Device/File not configured Device/File not configured Device/File not configured Cluster registry integrity check succeeded Logical corruption check succeeded 4. ????votedisk ,??????????: [grid@vrh1 ~]$ crsctl replace votedisk +SYSTEMDG CRS-4602: Failed 27 to add voting file 2e4e0fe285924f86bf5473d00dcc0388. CRS-4602: Failed 27 to add voting file 4fa54bb0cc5c4fafbf1a9be5479bf389. CRS-4602: Failed 27 to add voting file a109ead9ea4e4f28bfe233188623616a. CRS-4602: Failed 27 to add voting file 042c9fbd71b54f5abfcd3ab3408f3cf3. CRS-4602: Failed 27 to add voting file 7b5a8cd24f954fafbf835ad78615763f. Failed to replace voting disk group with +SYSTEMDG. CRS-4000: Command Replace failed, or completed with errors. ????????ASM???,???ASM: SQL> alter system set asm_diskstring='/dev/asm*'; System altered. SQL> create spfile from memory; File created. SQL> startup force mount; ORA-32004: obsolete or deprecated parameter(s) specified for ASM instance ASM instance started Total System Global Area 283930624 bytes Fixed Size 2227664 bytes Variable Size 256537136 bytes ASM Cache 25165824 bytes ASM diskgroups mounted SQL> show parameter spfile NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ spfile string /g01/11.2.0/grid/dbs/spfile+AS M1.ora [grid@vrh1 trace]$ crsctl replace votedisk +SYSTEMDG CRS-4256: Updating the profile Successful addition of voting disk 85edc0e82d274f78bfc58cdc73b8c68a. Successful addition of voting disk 201ffffc8ba44faabfe2efec2aa75840. Successful addition of voting disk 6f2a25c589964faabf6980f7c5f621ce. Successful addition of voting disk 93eb315648454f25bf3717df1a2c73d5. Successful addition of voting disk 3737240678964f88bfbfbd31d8b3829f. Successfully replaced voting disk group with +SYSTEMDG. CRS-4256: Updating the profile CRS-4266: Voting file(s) successfully replaced 5. ??has??,??cluster????: [root@vrh1 ~]# crsctl check crs CRS-4638: Oracle High Availability Services is online CRS-4537: Cluster Ready Services is online CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online [root@vrh1 ~]# crsctl query css votedisk ## STATE File Universal Id File Name Disk group -- ----- ----------------- --------- --------- 1. ONLINE 85edc0e82d274f78bfc58cdc73b8c68a (/dev/asm-diskh) [SYSTEMDG] 2. ONLINE 201ffffc8ba44faabfe2efec2aa75840 (/dev/asm-diskg) [SYSTEMDG] 3. ONLINE 6f2a25c589964faabf6980f7c5f621ce (/dev/asm-diski) [SYSTEMDG] 4. ONLINE 93eb315648454f25bf3717df1a2c73d5 (/dev/asm-diskj) [SYSTEMDG] 5. ONLINE 3737240678964f88bfbfbd31d8b3829f (/dev/asm-diskk) [SYSTEMDG] Located 5 voting disk(s). [root@vrh1 ~]# crsctl stat res -t -------------------------------------------------------------------------------- NAME TARGET STATE SERVER STATE_DETAILS -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.BACKUPDG.dg ONLINE ONLINE vrh1 ora.DATA.dg ONLINE ONLINE vrh1 ora.LISTENER.lsnr ONLINE ONLINE vrh1 ora.LSN_MACLEAN.lsnr ONLINE ONLINE vrh1 ora.SYSTEMDG.dg ONLINE ONLINE vrh1 ora.asm ONLINE ONLINE vrh1 Started ora.gsd OFFLINE OFFLINE vrh1 ora.net1.network ONLINE ONLINE vrh1 ora.ons ONLINE ONLINE vrh1 -------------------------------------------------------------------------------- Cluster Resources -------------------------------------------------------------------------------- ora.LISTENER_SCAN1.lsnr http://www.askmaclean.com 1 ONLINE ONLINE vrh1 ora.cvu 1 OFFLINE OFFLINE ora.oc4j 1 OFFLINE OFFLINE ora.scan1.vip 1 ONLINE ONLINE vrh1 ora.vprod.db 1 ONLINE OFFLINE 2 ONLINE OFFLINE ora.vrh1.vip 1 ONLINE ONLINE vrh1 ora.vrh2.vip 1 ONLINE INTERMEDIATE vrh1 FAILED OVER

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• Creating a MiniDump of a running process

  - by Lodle

  Im trying to make a tool for my end users that can create a MiniDump of my application if it hangs (i.e. external to the app). Im using the same code as the internal MiniDumper but with the handle and processid of the app but i keep getting error code 0xD0000024 when calling MiniDumpWriteDump. Any ideas? void produceDump( const char* exe ) { DWORD processId = 0; HANDLE process = findProcess(exe, processId); if (!process || processId == 0) { printf("Unable to find exe %s to produce dump.\n", exe); return; } LONG retval = EXCEPTION_CONTINUE_SEARCH; HWND hParent = NULL; // find a better value for your app // firstly see if dbghelp.dll is around and has the function we need // look next to the EXE first, as the one in System32 might be old // (e.g. Windows 2000) HMODULE hDll = NULL; char szDbgHelpPath[_MAX_PATH]; if (GetModuleFileName( NULL, szDbgHelpPath, _MAX_PATH )) { char *pSlash = _tcsrchr( szDbgHelpPath, '\\' ); if (pSlash) { _tcscpy( pSlash+1, "DBGHELP.DLL" ); hDll = ::LoadLibrary( szDbgHelpPath ); } } if (hDll==NULL) { // load any version we can hDll = ::LoadLibrary( "DBGHELP.DLL" ); } LPCTSTR szResult = NULL; int err = 0; if (hDll) { MINIDUMPWRITEDUMP pDump = (MINIDUMPWRITEDUMP)::GetProcAddress( hDll, "MiniDumpWriteDump" ); if (pDump) { char szDumpPath[_MAX_PATH]; char szScratch [_MAX_PATH]; time_t rawtime; struct tm * timeinfo; time ( &rawtime ); timeinfo = localtime ( &rawtime ); char comAppPath[MAX_PATH]; SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA , NULL, SHGFP_TYPE_CURRENT, comAppPath ); //COMMONAPP_PATH _snprintf(szDumpPath, _MAX_PATH, "%s\\DN", comAppPath); CreateDirectory(szDumpPath, NULL); _snprintf(szDumpPath, _MAX_PATH, "%s\\DN\\D", comAppPath); CreateDirectory(szDumpPath, NULL); _snprintf(szDumpPath, _MAX_PATH, "%s\\DN\\D\\dumps", comAppPath); CreateDirectory(szDumpPath, NULL); char fileName[_MAX_PATH]; _snprintf(fileName, _MAX_PATH, "%s_Dump_%04d%02d%02d_%02d%02d%02d.dmp", exe, timeinfo->tm_year+1900, timeinfo->tm_mon, timeinfo->tm_mday, timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec ); _snprintf(szDumpPath, _MAX_PATH, "%s\\DN\\D\\dumps\\%s", comAppPath, fileName); // create the file HANDLE hFile = ::CreateFile( szDumpPath, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL ); if (hFile!=INVALID_HANDLE_VALUE) { MINIDUMP_CALLBACK_INFORMATION mci; mci.CallbackRoutine = (MINIDUMP_CALLBACK_ROUTINE)MyMiniDumpCallback; mci.CallbackParam = 0; MINIDUMP_TYPE mdt = (MINIDUMP_TYPE)(MiniDumpWithPrivateReadWriteMemory | MiniDumpWithDataSegs | MiniDumpWithHandleData | //MiniDumpWithFullMemoryInfo | //MiniDumpWithThreadInfo | MiniDumpWithProcessThreadData | MiniDumpWithUnloadedModules ); // write the dump BOOL bOK = pDump( process, processId, hFile, mdt, NULL, NULL, &mci ); DWORD lastErr = GetLastError(); if (bOK) { printf("Crash dump saved to: %s\n", szDumpPath); return; } else { _snprintf( szScratch, _MAX_PATH, "Failed to save dump file to '%s' (error %u)", szDumpPath, lastErr); szResult = szScratch; err = ERR_CANTSAVEFILE; } ::CloseHandle(hFile); } else { _snprintf( szScratch, _MAX_PATH, "Failed to create dump file '%s' (error %u)", szDumpPath, GetLastError()); szResult = szScratch; err = ERR_CANTMAKEFILE; } } else { szResult = "DBGHELP.DLL too old"; err = ERR_DBGHELP_TOOLD; } } else { szResult = "DBGHELP.DLL not found"; err = ERR_DBGHELP_NOTFOUND; } printf("Could not produce a crash dump of %s.\n\n[error: %u %s].\n", exe, err, szResult); return; } this code works 100% when its internal to the process (i.e. with SetUnhandledExceptionFilter)

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• How to make MVC 4 Razor Html.Raw work for assignment in HTML within script tags

  - by Yarune

  For a project I'm using jqote for templating in JavaScript and HTML generated by MVC 4 with Razor. Please have a look at the following code in HTML and Razor: <script id="testTemplate" type="text/html"> <p>Some html</p> @{string id = "<%=this.Id%>";} <!-- 1 --> @if(true) { @Html.Raw(@"<select id="""+id+@"""></select>") } <!-- 2 --> @if(true) { <select id="@Html.Raw(id)"></select> } <!-- 3 --> @Html.Raw(@"<select id="""+id+@"""></select>") <!-- 4 --> <select id="@Html.Raw(id)"></select> <!-- 5 --> <select id="<%=this.Id%>"></select> </script> The output is this: <script id="testTemplate" type="text/html"> <!-- 1 --> <select id="<%=this.Id%>"></select> <!--Good!--> <!-- 2 --> <select id="&lt;%=this.Id%&gt;"></select> <!--BAD!--> <!-- 3 --> <select id="<%=this.Id%>"></select> <!--Good!--> <!-- 4 --> <select id="<%=this.Id%>"></select> <!--Good!--> <!-- 5 --> <select id="<%=this.Id%>"></select> <!--Good!--> </script> Now, the problem is with the second select under <!-- 2 -->. One would expect the Html.Raw to kick in here but somehow it doesn't. Or Razor wants to HtmlEncode what's in there. The question is: Does anyone have an idea why? Is this a bug or by design? Without the script tags it works. But we need the script tags cause we need to template in JavaScript. Hardcoded it works, but we need to use a variable because this will not always be a template. Without the @if it works, but it's there, we need it. Workarounds These lines give similar good outputs: @if(true) { <select id= "@Html.Raw(id)"></select> } @if(true) { <select id ="@Html.Raw(id)"></select> } @if(true) { <select id @Html.Raw("=")"@Html.Raw(id)"></select> } We're planning to do this: <script id="testTemplate" type="text/html"> @{string id = @"id=""<%=this.Id%>""";} @if(true) { <select @Html.Raw(id)></select> } </script> ...to keep as to markup intact as much as possible.

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• The best cross platform (portable) arbitrary precision math library

  - by Siu Ching Pong - Asuka Kenji

  Dear ninjas / hackers / wizards, I'm looking for a good arbitrary precision math library in C or C++. Could you please give me some advices / suggestions? The primary requirements: It MUST handle arbitrarily big integers (my primary interest is on integers). In case that you don't know what the word arbitrarily big means, imagine something like 100000! (the factorial of 100000). The precision MUST NOT NEED to be specified during library initialization / object creation. The precision should ONLY be constrained by the available resources of the system. It SHOULD utilize the full power of the platform, and should handle "small" numbers natively. That means on a 64-bit platform, calculating 2^33 + 2^32 should use the available 64-bit CPU instructions. The library SHOULD NOT calculate this in the same way as it does with 2^66 + 2^65 on the same platform. It MUST handle addition (+), subtraction (-), multiplication (*), integer division (/), remainder (%), power (**), increment (++), decrement (--), gcd(), factorial(), and other common integer arithmetic calculations efficiently. Ability to handle functions like sqrt() (square root), log() (logarithm) that do not produce integer results is a plus. Ability to handle symbolic computations is even better. Here are what I found so far: Java's BigInteger and BigDecimal class: I have been using these so far. I have read the source code, but I don't understand the math underneath. It may be based on theories / algorithms that I have never learnt. The built-in integer type or in core libraries of bc / Python / Ruby / Haskell / Lisp / Erlang / OCaml / PHP / some other languages: I have ever used some of these, but I have no idea on which library they are using, or which kind of implementation they are using. What I have already known: Using a char as a decimal digit, and a char* as a decimal string and do calculations on the digits using a for-loop. Using an int (or a long int, or a long long) as a basic "unit" and an array of it as an arbitrary long integer, and do calculations on the elements using a for-loop. Booth's multiplication algorithm What I don't know: Printing the binary array mentioned above in decimal without using naive methods. Example of a naive method: (1) add the bits from the lowest to the highest: 1, 2, 4, 8, 16, 32, ... (2) use a char* string mentioned above to store the intermediate decimal results). What I appreciate: Good comparisons on GMP, MPFR, decNumber (or other libraries that are good in your opinion). Good suggestions on books / articles that I should read. For example, an illustration with figures on how a un-naive arbitrarily long binary to decimal conversion algorithm works is good. Any help. Please DO NOT answer this question if: you think using a double (or a long double, or a long long double) can solve this problem easily. If you do think so, it means that you don't understand the issue under discussion. you have no experience on arbitrary precision mathematics. Thank you in advance! Asuka Kenji

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• How you remember by default functionality/class name etc of the platform

  - by piemesons

  Hello everyone, I am 8 months experienced guy, (B.tech in computer science) In my college time i used to create simple programs in c/c++/java. Simple programs like creating linked list/binary trees programs. frankly saying those college bullshit exercise.(I am from India so Engg colleges in india sucks except few like IIT's etc). In my college time apart from my college exercises i created some better programs/games like arachnoid, snake. We had 6 months internship in our college curriculum. I worked on asp.net. Basically the work was to create a website with some random functionality. After that in my job i worked on php and successfully deployed 4 projects. All having lot of functionality and i was the only team member in all the projects. Now i am learning ruby on rails as i switched to a new firm. I also have to work on android or iphone depending upon on what mobile technology i want to choose or i can work on both of the technologies. My project manager says take your time to learn things. we are not in hurry to place you in any project. Work on things by your self. take 3 4 months to learn. But i am not getting good pace. I am quite confident with php/asp etc but i dont able to grasp things in android. Although my c/c++ background is quite good, having a good logical mind. But i am not able to grasp the things in android. Even learning some basics of rails i found it wtf. Why i have make model name singular and table name plural.By default that action name and name of the file in view is same I just hate the word MAGIC mentioned more than 100 times in the book. (agile-web-development-with-rails) (I am talking about default functionality, I can over ride them that i know, so please dont debate on that) I not saying i am not getting the things. My point is remembering the default functionality is a pissing me off. Lots of classes. Lots of files . specify this thing here. That thing there. All these things (remember which class does what) require some time or i am missing something. For my point of view i am having all these problems cause previously i never used object oriented programming approach in php. (I NEVER USED, I AM NOT SAYING THET ARE NOT) How you people explain it. How you people suggest me to do. I am looking suggestions from some seniors.From seniors in my office.They says you good dude. But i dont know i am not geting confidence in the things. When they ask me anythings about the topics i cover. I give them good answers. So when i discuss this problem with them they says there is no problem just keep on working. And sorry for my poor english.

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• Dell 2950 Perc 6/i "physical disk" and "Enclosure(Backplane)" under Connector 1 in OMSA tree- Troubleshoot help

  - by user66357

  Just looking for someone who might know why this could occur... In OMSA, on my Dell 2950, there usually is only one "Physical Disks" child under "Enclosure (Backplane)" in the tree view. Currently, the tree looks like this: Dell PERC 6/i Integrated Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 removed) Physical Disks (1:33 Ready but unused) Normally it's like this: Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 good) From the front, 6 of 6 3.5" SAS drives are connected. The server is showing Slot 5 as bad and the disk as removed. It seems that the drive in Slot 5 is being sensed as external to the Enclosure. Any ideas why this would happen? Think I can get away with rebuilding the virtual disk by replacing 1:05 with 1:33? Thanks. UPDATE: The only options on the Physical Disk 1:33 were Assign as Global Hot Spare and Clear... After clearing, I assigned it as the Global Hot Spare. This allowed the rebuilding of the virtual disk. Hopefully it won't fail. I'm still unsure of the reason for this odd behavior. I'm checking the firmware next.

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• Coldfusion on VPS, how much JVM heap memory?

  - by Steven Filipowicz

  Recently I got a VPS server and I'm running Coldfusion, the website was running fine until it got more and more traffic and I started to encounter 'OutOfMemory' exceptions. I thought simply to rise the memory of the VPS server, but this didn't help. After doing some Google searches I found a setting in de CF Admin settings to set the JVM Heap memory. It was on the standard: Max Heap size 512MB and Min Heap size was empty. After playing around a bit I have now set it to Min 50MB and Max 200MB, good things is that I'm not getting the 'OutOfMemory' exceptions anymore. So far so good! But with about 50 active visitors on the website, the website starts to get slow. The CPU usage is only about 8% (Windows Taskmanager), also the taskmanager show only about 30% of the 3GB RAM in use. So I'm thinking that my values could be tweaked to use more of the RAM. Honestly I don't understand these JVM Memory heap settings, so I have no clue what is a good setting for me. I found a CF script that displays the memory usage, the details are: Heap Memory Usage - Committed 194 MB Heap Memory Usage - Initial 50.0 MB Heap Memory Usage - Max 194 MB Heap Memory Usage - Used 163 MB JVM - Free Memory 31.2 MB JVM - Max Memory 194 MB JVM - Total Memory 194 MB JVM - Used Memory 163 MB Memory Pool - Code Cache - Used 13.0 MB Memory Pool - PS Eden Space - Used 6.75 MB Memory Pool - PS Old Gen - Used 155 MB Memory Pool - PS Perm Gen - Used 64.2 MB Memory Pool - PS Survivor Space - Used 1.07 MB Non-Heap Memory Usage - Committed 77.4 MB Non-Heap Memory Usage - Initial 18.3 MB Non-Heap Memory Usage - Max 240 MB Non-Heap Memory Usage - Used 77.2 MB Free Allocated Memory: 30mb Total Memory Allocated: 194mb Max Memory Available to JVM: 194mb % of Free Allocated Memory: 16% % of Available Memory Allocated: 100% My JVM arguments are: -server -Dsun.io.useCanonCaches=false -XX:MaxPermSize=192m -XX:+UseParallelGC - Dcoldfusion.rootDir={application.home}/../ -Dcoldfusion.libPath={application.home}/../lib Can I give the JVM more memory? If so, what settings should I use? Thanks very much!!

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• Advice needed: ADSL and VPN for a small company

  - by Saajid Ismail

  Hi. I need advice on purchasing an ADSL modem/router for a small company. At the moment, we are using the iBurst Wireless service for internet connectivity. I have the iBurst desktop modem, which connects to my Netgear WNR2000 router via ethernet. I am using the Netgear WNR2000 to deploy a wireless network as well. I have also set up a VPN using Windows Server 2003, and enabled the VPN Passthrough settings on the Netgear router. I am able to connect to the office network remotely without difficulty. However the problem that I've read is that the Netgear WNR2000 only supports VPN passthrough for a single session. This is simply not good enough. I need to be able to support at least 3 concurrent VPN connections immediately, and up to 5 in the near future. Now I am cancelling my iBurst Wireless service and have just got my ADSL line installed. I have to purchase an ADSL modem, and now is a good time to think of future proofing my investment. I need a good ADSL modem, that will allow me to support at least 5 concurrent VPN connections, or more, without breaking the bank. My budget is about 150-200 USD. I believe that my current Netgear WNR2000 router will be useless, except maybe to extend my wireless network in the future by a bit. Is there a solution where I can still use my Netgear WNR2000 for WiFi, for e.g., by connecting a cheaper non-WiFi ADSL modem to the Netgear router? If not, then which WiFi-enabled ADSL modem/router that supports at least 5 VPN passthroughs can you recommend? To sum it up, I need an ADSL modem/router that is: ADSL & ADSL2+ compatible has built-in 802.11n 270/300mbps WiFi (if having this feature doesn't push the price up too much) supports at least 5 VPN connections using VPN passthrough EDIT: Answer 2.10 in the following FAQ has me a bit worried - What is VPN/multiple VPN Pass-through?

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• Multiple contacts with shared information

  - by Keith Thompson

  Background: I currently have several hundred contacts, synchronized between a Microsoft Exchange server and several mobile devices. I also save exported copies of the contacts in .vcf format. Is there a good way (application, file format, whatever) to maintain contacts with shared information? A very common scenario is that I have contacts for two or more people who live in the same house, for example: John Doe 123 Main Street, Anytown USA Home: 555-555-1111 Work: 555-555-2222 Mobile: 555-555-3333 E-mail: [email protected] Jane Doe 123 Main Street, Anytown USA Home: 555-555-1111 Work: 555-555-4444 Mobile: 555-555-5555 E-mail: [email protected] As you can see, both contacts have the same home address and phone number, but distinct names and work and mobile phone numbers. (Other information might also be either shared or distinct.) The applications and file formats I'm familiar with don't seem to have a good way to deal with this. If I use a single "John & Jane Doe" contact for both, it's difficult to distinguish the distinct information (if I want to call Jane's mobile phone rather than John's). If I use a separate contact for each, I have to remember to update both of them (or all of them for N 2) when they move or change their home phone number. An ideal solution would let me create a record containing information for their household, and have each of their contact records contain a reference to the household record, so that when I view John's contact record I see both shared and distinct information. Is there anything out there that has good support this kind of thing? (I would think there would be, since it's a very common scenario.) (I suppose I could roll my own system that generates merged .vcf files from some extended format, but that wouldn't play well with synchronizing across multiple devices.)

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• Is there a way to tell what the download speed is from a site/server

  - by Memor-X

  i'm looking into which ISP i should go with at the place i'm moving into, one ISP which i have been told good things about has data limits (which when breached will drop your speed to dial-up speed) but multiple memberships which, apart from the cheapest membership, have the same data limits (the cheapest has a 10GB data limit) in their fine print, they say that each different membership has different port speeds, one particular part jumps out at me These speeds are the NBN (National Broadband Network) port speed and not the actual Internet data speed which will vary based on numerous factors including destination you are reaching, your network equipment, network congestion etc. i plan to use the net to download DLC and patch updates for games (particular the insanely large update for the Wii U) and games from Steam (if i find any good one other than this one JRPG) and downloading development resources from free sites like Deposit Files and Mediafire since one membership with a 1000GB data limit is $145 with the port speed being 12Mbps/1Mbps (cheapest) while another with the same limit is $190 with the port speed of 100Mbps/40Mbps (expensive) i am wondering how i can tell what the speed coming from site is since i don't want to be wasting money on speed that makes no difference (unlike memory which i rather have to spare) NOTE: the speeds are for a fiber optic network which where my new place is can only connect via fixed wireless which i may not be able to get with this ISP but if i can get this network then good NOTE 2: most of the resources i get from Deposit Files are always about 200 MB or less, if a resource pack is greater then it's split into multiple archives (like .7z.part) while Mediafire i have to see one bigger than 150MB NOTE 3: one update patch for a PS3 game is close to 4 GB (Disgaea 4) which i need to get access to the DLC and on the weekend i downloaded 5 GB for the Final Fantasy XIV Open Beta for the PS3 which took almost 5 hours

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• DIY NAS - links for Instructions

  - by Kaushik Gopal

  Good folk of SU, I'm planning to build a NAS (Network Access Storage). I'm planning to do it cheap (:read Old PC Config + Open source software). I was looking for good DIY links . Before you shoot this down as a Repost, I'm only looking for good links containing detailed instructions for setting up a NAS. I did a fair bit of searching and found these links (so please suggest others. While these links are great they delve more on the hardware side, i'm looking for more instructions in the software side). For the sake of the interwebs: Ubuntu: http://snarfquest.com/wiki/index.php/Setting_up_a_Home_NAS http://www.smallnetbuilder.com/content/view/27962/77/ http://jonpeck.blogspot.com/2006/11/how-to-configure-80-fileserver-in-45.html FreeNAS http://www.smallbusinesscomputing.com/webmaster/article.php/3719706 http://www.codeproject.com/KB/system/homemade_nas.aspxhttp://www.codeproject.com/KB/system/homemade_nas.aspx There was one at rubbervir.us that everyone points to, but apparently the site has gone down. A couple of other queries: Is Printer/Scanner sharing a possibility with NAS devices? Many talk of torrent support with NAS Devices, a little more light on this? Does this mean, an auto download of torrent through a feed into NAS, or just support for storing Torrent download files onto the NAS(don't see the difference between the latter and a normal file tranfer)

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• Distributing a custom command line tool to enterprise servers

  - by Jeremy Baker

  I've been tasked with building a command line tool that we will be providing to our enterprise customers so that they can use the API to upload data to our platform. The API works with standard cURL requests, so I can do most of the basic functionality with simple bash scripting, although I would like to provide something that is solid and really makes it easy for them to use and I don't know what I don't know. It's been a good 8 years since I've really done any serious sysadmin work. Most of the good tools I use these days are written in Ruby or Python and have a standard distribution process (Gems, for example). However, I know rhel and other platforms have their own package managers. Finally, the question: In today's day and age, what language / distribution method should I consider in order to cover the widest range of platforms without having to build completely different versions for each platform? I'd also love any general feedback you have about building similar projects, or links to projects that you think do a good job of this now and have open source code that I could read. Thanks in advance!

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• Is my HDD dead forever?

  - by Roberto

  Yesterday I turned on my computer and it couldn't boot. I found out the hd (320GB SATA Seagate Momentus 7200.3 for notebook) was broken and it couldn't be recognized by the BIOS. I have another of the same hard drive, so I exchanged the boards. I found out that there is a problem on its board since my good hard drive didn't work. But the broken hard drive doesn't work with the good board as well: it can be recognized but when I insert a Windows Instalation DVD it says the hard drive is 0GB. I put it in a case and use it in another computer via USB, and but it doesn't show up in the "My Computer". I used a software to recover files called "GetDataBack for NTFS", it recognized the hard drive but with the wrong size (2TB). I try to make it read the hard drive but it got an I/O error reading sector. It tries to read, the hard drive spins up. So, since I'm using a good board on it, the problem seems to be internal. Is there anything someone could do to recover the files from it?

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• "Learning" Linux

  - by Strider

  I've been interested in computers for a long time and have fiddled with a lot of stuff which includes Linux. I started out with Red Hat when I was young (around 13) and lost all data, converting a FAT32 drive to something else. Later it was Knoppix which was really helpful in recovery and such. Then, it was Ubuntu. Also, I fiddled with Arch for some time, but, it breaks too often for my liking (maybe, I should have been more careful). Anyway, currently I use Ubuntu 9.04. I want to dig deeper into the Linux world now. I want to learn how things work and use the terminal more. I am a programmer as well, so, it will help a lot. So, the thing I wanted to ask were: Good books to learn and understand Linux Good habits to use Linux more efficiently. Good tools about which I should know. Amount of time you set aside to learn about new things each day. As a programmer, how do you setup and use Linux efficiently. Long list. I will be grateful to the answerers.

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• Dual pane file manager for Mac OS

  - by Alex Kaushovik

  Is there a good customizable dual-pane file manager for Mac like Total Commander / Far Manager in Windows, or like Krusader / Midnight Commander in Linux? I used to work on Windows for quite a while and mostly used Far Manager and sometimes Total Commander, then I switched to Ubuntu Linux and used Krusader, now I switched to Mac OS (Snow Leopard) and I'm having a hard time trying to find a good file manager... Many of the existing applications are trying to replace the Finder with "multimedia capabilities nobody cares about in file manager - IMHO" (Path Finder, ForkLift), some of them are almost good dual-pane file managers (couldn't remember examples), but none of them worked for me mostly because of one reason: I couldn't integrate my file/folder comparison utility (Araxis Merge for Mac) with them... The way it worked for me in Windows and Linux is that I was setting the cursor on one file in the left pane, then setting the right-pane cursor on another file in right pane, then I pressed a hotkey that launched Araxis Merge with those to files/folders comparison results. It was very easy to set up in Far Manager (Windows) and Krusader (Linux, actually in Linux I used "Meld" instead of Araxis Merge...) The tool I'm looking for doesn't necessarily has to be free... Thank you!

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• Dual pane file manager for Mac OS

  - by Alex Kaushovik

  Is there a good customizable dual-pane file manager for Mac like Total Commander / Far Manager in Windows, or like Krusader / Midnight Commander in Linux? I used to work on Windows for quite a while and mostly used Far Manager and sometimes Total Commander, then I switched to Ubuntu Linux and used Krusader, now I switched to Mac OS (Snow Leopard) and I'm having a hard time trying to find a good file manager... Many of the existing applications are trying to replace the Finder with "multimedia capabilities nobody cares about in file manager - IMHO" (Path Finder, ForkLift), some of them are almost good dual-pane file managers (couldn't remember examples), but none of them worked for me mostly because of one reason: I couldn't integrate my file/folder comparison utility (Araxis Merge for Mac) with them... The way it worked for me in Windows and Linux is that I was setting the cursor on one file in the left pane, then setting the right-pane cursor on another file in right pane, then I pressed a hotkey that launched Araxis Merge with those to files/folders comparison results. It was very easy to set up in Far Manager (Windows) and Krusader (Linux, actually in Linux I used "Meld" instead of Araxis Merge...) The tool I'm looking for doesn't necessarily has to be free... Thank you!

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• Free web-based software for team collaboration/documentation

  - by Jason Antman

  Looking for some advice here, as my search has turned up to be pretty fruitless. My group (9 people - SAs, programmers, and two network guys) is looking for some sort of web tool to... ahem... "facilitate increased collaboration" (we didn't use a buzzword generator, I swear). At the moment, we have an unified ticketing system that's braindead, but is here to stay for political/logistical reasons. We've got 2 wikis ("old" and "new"), neither of which fulfill our needs, and are therefore not used very often. We're looking for a free (as in both cost and open source) web-based tool. Management side: Wants to be able to track project status, who's doing what, whether deadlines are being met, etc. Doesn't want full-fledged "project management" app, just something where we can update "yeah this was done" or "waiting for Bob to configure the widgets". TeamBox (www.teambox.com) was suggested, but it seems almost too gimmicky, and doesn't meet any of the other requirements: Non-management side: - flexible, powerful wiki for all documentation (i.e. includes good tables, easy markup, syntax highlighting, etc.) - good full text search of everything (i.e. type in a hostname and get every instance anyone ever uttered that name) - task lists or ToDo lists, hopefully about to be grouped into a number of "projects" - file uploads - RSS or Atom feeds, email alerts of updates We're open to doing some customizations (adding some features, notification/feeds, searching, SVN integration, etc.) but need something F/OSS that will run under Apache. My conundrum is that most of the choices I've found so far fall into one of these categories: project management/task tracking with poor wiki/documentation/knowledge base support wiki with no task tracking support ticketing system with everything else bolted on (we already have one that we're stuck with) code-centric application (we do little "development", mostly SA work) Any suggestions? Or, lacking that, any comments on which software would be easiest to add the lacking features to (hopefully ending up with something that actually looks good and works well)?

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• What is Best storage servers infrastructure ? DAS/NAS/SAN or installing GlusterFS/LUSTER/HDFS/RBDB

  - by TORr0t

  I am trying to design an infrastucture for the project I am working on. It would be somehow a file-sharing/downloading project (like rapidshare) and I would need high storage sizes and good scability, and I would add new storage nodes after my project grows up. I have come up with 3 solutions for my project which are using Luster, GlusterFS, HDFS, RDBD. For start, i would have 2 servers, one server is for glusterfs client + webserver + db server+ a streaming server, and the other server is gluster storage node. (After sometime, i would be adding more node servers, and client servers (dont know how many new client new servers to add, will see later) So, i am thinking to work with glusterfs. But i really wonder that if i have to use high performance servers with high sotrage sizes or avarage/slow servers with high storage sizes? Or nas/das/san solutions are better for glusterfs storage nodes? I might buy a nas and install glusterfs onto it. I would be happy to listen to your recommendations for the server properties (for each clients and nodes) . I really dont know if I really need high amount of ram and good cpus to for the nodes. I am sure i need it for client servers. The files would be streamed as well, so the Automatic file replication is important, thus, my system should work like a cloud, when needed, according to high traffic, the storage nodes should copy the most demanded file to be streamed and would help me to get rid of scability problems and my visitors would able to stream/download those files. Also, i am open to your experiences/thoughts about any good solution. Luster, hdfs, rbdb are the other options and i would be happy to listen to your thoughts here. I would be very very happy to hear back from anyone commented of any words I have used here. Thanks

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• Recommendations for colocation in the US

  - by Emil

  Hello serverfault I work for a European media company and we are currently looking for colocation in the US. I know the European market quite well unfortunately that is not the case for the US. I'm hoping for you guys to help me out a bit with a few questions, it would be much appreciated! I am looking for a data center that can deliver a high level of availability (tier 3 or better). The installation will be fairly large so capacity is important. Good internet connectivity/carrier presence. However most important is good customer support, skilled dedicated and responsive technical staff, since we won't have tech staff close by. I'm looking for a small and fast moving company that target internet businesses rather than big old enterprise hosting. What locations should we go for given that we want to reach all of the US from a single site and still maintain decent latency? (do we need east and west coast?) Where are the main internet hubs and should you try and get as close as possible? Are there any good online resources I should look at? Where do the large scale internet/media services colocate? Lastly I would be very happy to get some actual recommendations for companies to talk to P.S I'm happy to return the favor if anyone has question regarding data centers and colocation in Europe.

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• Ubuntu Server mdadm drbd ocfs2 kvm hangs under heavy file reading

  - by Stefano Annese

  I have deployed four ubuntu 10.04 server. They are coupled two by two in a cluster scenario. on both sides we have software raid1 disks, drbd8 and OCFS2 and on top of it some kvm machines run with qcow2 disks. I followed this: Link corosync is just used for DRBD and OCFS, the kvm machines are run "manually" When it works is fine: good performances, good I/O, but at a given time one of the two cluster started hanging. Then we tried with just one server turned on and it hangs the same. It seems to happen when an heavy READ in one of the virtual machines occurs, that is during rsyn backup. When the fact occurs the virtual machines are not reachable any more and the real server responds with good delay to the ping but no screen and no ssh is available. All we can do is force shutdown (hold the button) and restart and when it turns on again the raid on which relay drbd is resyncing. All the time it hangs we see such fact. After a couple of week of pain on one side this morning also the other cluster hung, but it has different moteherboard, ram, kvm instances. What is similar is reading for rsync scenario and Western Digital RAID Edistion disks on both side. Can anybody give me some input to solve such issue?

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• scan partition for bad blocks

  - by user22559

  Hello everyone I have a hard disk with bad sectors on it. I want to partition the drive so that the partitions are in the good part of the hard disk, and the parts that have bad sectors are not used. The first ~20GB of the hard disk are good. Then comes a ~13GB part that is riddled with bad sectors. After that, the hard disk is good again, but at the very end there is a ~2GB part with bad sectors. I have used an app called "Hdtune" to get this information, and I have created a 19GB c: partition at the beginning of the drive, then skipping the 13GB of bad sectors, then creating the D: partition that spans the rest of the disk, minus the last 2GB. The C: partition works well (i have been using it for a month and i have got no error whatsoever), but the D partition has been giving me problems. Somehow, it seems that I have some bad sectors in the D: partition. I am looking for an app that scans the HDD, finds the bad blocks, and shows them in a map so I can see if they are in the D partition. Or, an app that scans only a specified partition for bad sectors, and then shows in a map where the bad sectors are in the partition. I want to know this so I can resize the D partition so that it is outside of the bad area of the disk.

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• VMWare Workstation Linux Host performance tuning

  - by Hoghweed

  I need to improve my linux hosted vmware workstation for using multiple virtual machines at the same time. I feel very stupid I lost a great blog post link which I found last month (and I'm not able to find it again..) so I try to ask here if anyone can help me: This is my host (laptop): 16GB DDR3 Ram HDD Hybrid 750GB 7200 (8GB SSD Cache) Mint 15 x64 Kernel 3.9.7 swappiness set to 10 The above are the important things about the host. So, My need is the ability to run 2 or 3 VMs at the same time. The lack of performance is about the disk, The last time from that blog post I lost, I setup /tmp to be mounted ad a memory partition and in my previous installation that was good, now I'm not able to find a good solution to tweak the things. I think with 16GB o RAM there will be no problems to run multiple VMs, but whe they start to swap or use the /tmp things going bad (guest cursor going too fast after a freeze, guest freeze and so on) Anyone can help me to fit a good host tweak and configuration to get better performance? Thanks in advance

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• Best video codec to store my own collection

  - by Jack

  Hello! I think this question has already been asked but with different flavours. My problem resised in the fact that my camera (Canon G9) creates video with almost raw codec (I think it's plain old MPEG) so a 10 minutes video is almost 900mb. I would like to convert them in a format that has a good trade-off between space and quality, but I would prefer having the quality as good as the original (of course this is not possible because of lossy compression) just saving as much space is possible with a minimal lose of quality. Which codec should I look for? H264? It seems to be the champion of the moment.. otherwise which other ones could I try? XviD? Which parameters should I use? I mean how many kbits/s is a fair good bitrate to keep high quality? And what about audio codec? video specs are 640x480 at 30fps or 1024x768 at 15fps.. thanks in advance!

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• Dual pane file manager for Mac OS X

  - by Alex Kaushovik

  Is there a good customizable dual-pane file manager for Mac like Total Commander / Far Manager in Windows, or like Krusader / Midnight Commander in Linux? I used to work on Windows for quite a while and mostly used Far Manager and sometimes Total Commander, then I switched to Ubuntu Linux and used Krusader, now I switched to Mac OS (Snow Leopard) and I'm having a hard time trying to find a good file manager... Many of the existing applications are trying to replace the Finder with "multimedia capabilities nobody cares about in file manager - IMHO" (Path Finder, ForkLift), some of them are almost good dual-pane file managers (couldn't remember examples), but none of them worked for me mostly because of one reason: I couldn't integrate my file/folder comparison utility (Araxis Merge for Mac) with them... The way it worked for me in Windows and Linux is that I was setting the cursor on one file in the left pane, then setting the right-pane cursor on another file in right pane, then I pressed a hotkey that launched Araxis Merge with those to files/folders comparison results. It was very easy to set up in Far Manager (Windows) and Krusader (Linux, actually in Linux I used "Meld" instead of Araxis Merge...) The tool I'm looking for doesn't necessarily has to be free... Thank you!

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• Monospace font which supports at least both of Korean hangul and the Georgian alphabet?

  - by hippietrail

  Being both a language enthusiast and a programmer, I find myself often doing programming or text processing involving foreign language alphabets and scripts. One annoyance however is that CJK fonts (those which support Chinese, Japanese, and/or Korean) usually only contain glyphs for Latin, Greek, and Cyrillic at best. Often the Asian glyphs will be beautiful but the other glyphs can be quite ugly. Just as often in text editors you can only choose a single font, not one for CJKV and one for other, which will be each used for rendering the appropriate characters. Korean is one of the languages I'm most interested in currently. I only need hangul / hangeul for monospaced editing, hanja isn't common enough to be a problem. Another of the languages I'm currently involved in is Georgian, which has its own alphabet which is a little exotic but has pretty good support in common fonts on Windows and *nix. But I am as yet unable to find a font with good Korean glyphs and also Georgian glyphs. My editor of choice is gVim, so an answer telling me how to set it to use two fonts together would be just as good. Currently I'm using it mostly under Windows 7 so a vim-specific solution would be needed rather than a *nix-specific solution.

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