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  • How do I make Linux recognize a new SATA /dev/sda drive I hot swapped in without rebooting?

    - by Philip Durbin
    Hot swapping out a failed SATA /dev/sda drive worked fine, but when I went to swap in a new drive, it wasn't recognized: [root@fs-2 ~]# tail -18 /var/log/messages May 5 16:54:35 fs-2 kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen May 5 16:54:35 fs-2 kernel: ata1: SError: { PHYRdyChg CommWake } May 5 16:54:40 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:45 fs-2 kernel: ata1: device not ready (errno=-16), forcing hardreset May 5 16:54:45 fs-2 kernel: ata1: soft resetting link May 5 16:54:50 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:55 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:54:55 fs-2 kernel: ata1: soft resetting link May 5 16:55:00 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:05 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:05 fs-2 kernel: ata1: soft resetting link May 5 16:55:10 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:40 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:40 fs-2 kernel: ata1: limiting SATA link speed to 1.5 Gbps May 5 16:55:40 fs-2 kernel: ata1: soft resetting link May 5 16:55:45 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:45 fs-2 kernel: ata1: reset failed, giving up May 5 16:55:45 fs-2 kernel: ata1: EH complete I tried a couple things to make the server find the new /dev/sda, such as rescan-scsi-bus.sh but they didn't work: [root@fs-2 ~]# echo "---" > /sys/class/scsi_host/host0/scan -bash: echo: write error: Invalid argument [root@fs-2 ~]# [root@fs-2 ~]# /root/rescan-scsi-bus.sh -l [snip] 0 new device(s) found. 0 device(s) removed. [root@fs-2 ~]# [root@fs-2 ~]# ls /dev/sda ls: /dev/sda: No such file or directory I ended up rebooting the server. /dev/sda was recognized, I fixed the software RAID, and everything is fine now. But for next time, how can I make Linux recognize a new SATA drive I have hot swapped in without rebooting? The operating system in question is RHEL5.3: [root@fs-2 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.3 (Tikanga) The hard drive is a Seagate Barracuda ES.2 SATA 3.0-Gb/s 500-GB, model ST3500320NS. Here is the lscpi output: [root@fs-2 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0a.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0d.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) Update: In perhaps a dozen cases, we've been forced to reboot servers because hot swap hasn't "just worked." Thanks for the answers to look more into the SATA controller. I've included the lspci output for the problematic system above (hostname: fs-2). I could still use some help understanding what exactly isn't supported hardware-wise in terms of hot swap for that system. Please let me know what other output besides lspci might be useful. The good news is that hot swap "just worked" today on one of our servers (hostname: www-1), which is very rare for us. Here is the lspci output: [root@www-1 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:19.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 09:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS (rev 04)

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  • Why is my Mac beeping at me in a Sprint-Nextel-PTT kind of way?

    - by Philip
    I'm really stumped about this one. Before on OSX 10.5 and now on OSX 10.6, my Mac occasionally beeps at me. It's a split-second "bee-bee-beep" that sounds vaguely similar to the push-to-talk beep you hear on Sprint/Nextel PTT commercials. I haven't been able to isolate what's running when it happens or what happens before it happens. Possible culprits are Quicksilver, Firefox, DropBox, Evernote helper, TrueCrypt, Wally. Any thoughts? Thanks.

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  • Seeking web-based FTP client for very large file upload

    - by Paul M. Nguyen
    I have looked around for these for some time... the limits imposed by the web server and/or the dynamic programming environment (e.g. PHP) are far too restrictive for the application I'm working on. We need to be able to move large graphics and video files to and from clients (ranging from tens of MB to a few GB in a single file). Plain FTP with a proper desktop client will do the trick, and we're hosting this in Amazon EC2 with EBS. User management will be done from the office via webmin. Users are chroot-jailed into their home dir by proftpd. net2ftp will work for many clients, but we often need to move single files that approach 1GB or exceed 2-3GB which is way out of the range of any http-based uploader. So we turn to Java or Flash - can they do it? From within the web browser establish an FTP connection and grab a huge file? There are licensed applets and such out there, but none seem convincing. Again, I'm looking for some code that can speak FTP and read (& write?) the local disk, that is delivered in a web browser, and can move single files of 2GB+. The reason for having a web-based interface to FTP is to skip the software installation step for our clients. I will consider proper desktop client software as long as it's "portable" and at least Win+Mac and can be easily configured by lay-man users in a hurry.

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  • Storage (EBS) attached to my EC2 instance reporting files on two devices at once

    - by Philip Isaacs
    I have on EC2 instance with two attached EBS drives. One drive /dev/sda1 is mounted on / The second /dev/sda2 is mounted on /var2 So here's what's strange. Whenever I add any files to /var2 the it is also reporting that the / device is also filling up. As if they are the same device. It's so strange. So if I were to save a 10 mb file to a directory on /var2. Both / and /var2 use 10 mb of space up. Is this bizarre?

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  • How to recover from a drive failure in a RAID 5 configuration?

    - by Philip Fourie
    This morning a drive failed on our database server. The drive array (3 disks) is setup in a RAID 5 configuration. While we wait for a drive replacement we are preparing for a recovery strategy. Users are continuing to work on the system, albeit very slowly (don't know why??). How does one install the new drive - will the data for this drive automatically be rebuilt from the parity or is there another process we should follow? Edit: This is a hardware RAID controller. (Thanks for the answers so far, appreciated)

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  • Horrible performing RAID

    - by Philip
    I have a small GlusterFS Cluster with two storage servers providing a replicated volume. Each server has 2 SAS disks for the OS and logs and 22 SATA disks for the actual data striped together as a RAID10 using MegaRAID SAS 9280-4i4e with this configuration: http://pastebin.com/2xj4401J Connected to this cluster are a few other servers with the native client running nginx to serve files stored on it in the order of 3-10MB. Right now a storage server has a outgoing bandwith of 300Mbit/s and the busy rate of the raid array is at 30-40%. There are also strange side-effects: Sometimes the io-latency skyrockets and there is no access possible on the raid for 10 seconds. The file system used is xfs and it has been tuned to match the raid stripe size. Does anyone have an idea what could be the reason for such a bad performing array? 22 Disks in a RAID10 should deliver way more throughput.

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  • How to know which speed of RAM can I use

    - by Phuong Nguyen
    I have a Dell Vostro 1000 which uses ATI RS480 mainboard. Specification says that the front bus of such mainboard is 1Ghz. However, the default RAM came with mainboard is PC4200 (533Mhz). I wonder if I can replace them with PC6400 (800Mhz) or at least PC5300 (667Mhz)?

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  • Ubuntu: Tar doesn't work correctly

    - by Phuong Nguyen
    It looks like tar is having some problems. I installed Ubuntu 10.04 alpha a few of weeks ago. After that, this alpha version is so terrible that I must switched back to 9.10. So, I backed up all of my profiles data (/home/my_user_name) to my_user_name.tar.gz Here what I did: (in U10.04) Open Nautilus and goto /home/my_user_name Press Ctrl+H to view all hidden files. Press Ctrl+A to select all files Right click and choose [Compress...] Now, when I have set up Ubuntu 9.10 again, I extract the tar using Extract Here command from Nautilus. Funny things happened: Instead of extracting to current folder, the archive manager create a folder named my_user_name and put the extracted content into it. All of the files that I placed directly under /home/my_user_name doesn't get extracted All of the directories that started with . (dot) is not extracted. I wonder if there is any incompatibility between tar in U10.04alpha and U9.10 that cause the problem? Now every of my email, basket data is long gone. I'm freaking right now. Is there anything I can do to get the tar return back my data?

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  • postfix header_checks using regexp proper setup

    - by Philip Rhee
    I just can't seem to figure out why header_checks are not being evaluated. I'm on Ubuntu 12.04, postfix 2.7, dovecote, spamassasin, clamav, amavis. I add following line to /etc/postfix/main.cf : header_checks = regexp:/etc/postfix/header_checks And here is header_checks : /From: .*/ REPLACE From: [email protected] To test out regexp : #postmap -q "From: <werwe>" regexp:/etc/postfix/header_checks which evaluates correctly and give me return output of : REPLACE From: [email protected] However, when I try to send email from commandline or from php webpage, postfix will not replace the From header. I'm stumped.

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  • How can I make Firefox remember my session while still clearing browsing history on close?

    - by Philip
    I am aware, thanks to this thread ( https://support.mozilla.com/en-US/forum/1/381229 ), that Firefox doesn't save sessions when browsing history is cleared at close, as effectively the open tabs are themselves cleared from the history before the session is saved. But I would like Firefox to behave differently. Is there any way to change Firefox's behavior so it will clear my browsing history when it closes, but remember only that a certain list of tabs were open, and then restore those tabs when it opens (not even necessarily with those tabs' histories)? I'm running FF 3.5.6 on Mac OS X 10.5. Thanks.

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  • Can I disable comments by default on my YouTube videos?

    - by Philip Durbin
    Comments are unfortunately always automatically enabled when I upload a video to YouTube either via their website or iPhoto, but more often that not I later manually disable comments for each uploaded video by following the steps from the "comments on my videos" section of YouTube Help. I would much rather have comments automatically disabled, that is to say, disabled by default, for all of my uploaded videos. Is this possible? I couldn't find a setting for it.

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  • Ubuntu: One or more of the mounts listed in fstab cannot ye be mounted

    - by Phuong Nguyen
    I was enjoying a Movie when my Ubuntu suddenly hung. At the next reboot, here is the message: One or more of the mounts listed in /etc/fstab cannot yet be mounted: /home: waiting for /dev/disk/by-uuid/.... Press ESC to enter a recovery shell. Problems: When I enter recovery shell, I don't know that to do. If I press Ctrl+D, then the message above will reappear. What should I do? I checked with Ubuntu Live CD and my partition looks OK. I have 2 separate partitions for / and /home

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  • How can I customize the notification from Google Notifier and Google+Growl?

    - by Philip
    As best I can tell, Google+Growl just makes the Google Notifier growl the notification instead of displaying its own. The GrowlMail plugin lets you configure what info is displayed upon receipt of a new message. Is there a way to configure what is displayed by the Google Notifier a la GrowlMail--in other words, to choose that I just want to see e.g. that there is a new message and the time, but not the sender or body, etc. etc....? Thanks!

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  • Sharing Internet Connection in Windows 7 is so much more frustrated than Windows XP

    - by Phuong Nguyen
    Back to the time of Windows XP, from Properties dialog of my Wireless Connection, I can enable sharing and then select LAN network from the Drop Down List and boom, I can share it with my friend. We just need a LAN cable (either cross or not-cross is OK) and his Laptop will get an auto IP to gain access to internet. But now with the new Windows 7, everything starts to suck. I cannot see the Drop Down List any more in the sharing panel and my friends Laptop cannot get an automatic IP anymore. Am I doing anything wrong over there? How can I gain back the peace I used to have with Windows XP?

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  • Sharing Internet Connection in Windows 7 is so much more frustrated than Windows XP

    - by Phuong Nguyen
    Back to the time of Windows XP, from Properties dialog of my Wireless Connection, I can enable sharing and then select LAN network from the Drop Down List and boom, I can share it with my friend. We just need a LAN cable (either cross or not-cross is OK) and his Laptop will get an auto IP to gain access to internet. But now with the new Windows 7, everything starts to suck. I cannot see the Drop Down List any more in the sharing panel and my friends Laptop cannot get an automatic IP anymore. Am I doing anything wrong over there? How can I gain back the peace I used to have with Windows XP?

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  • Install latest kernel to Ubuntu and have grub acknowledge the new installed kernel

    - by Phuong Nguyen
    I have an installed Ubuntu Distro (Karmic 9.10) already. However, due to some problems with xorg ati driver, I cannot standby my computer. Some guy have suggested me to try the latest version of xorg driver which in turn requires a newer version of Linux kernel than the newest release available from Ubuntu Central Repository (2.6.33). I have searched though several articles on how to install a custom Linux kernel. However, these articles are so 2004/2005 and they were talking about lilo (???). Since then, I'm afraid that I cannot make the Grub Boot recognize the new Linux kernel properly (I'm just a newbie to Linux). I would love to know how to install the kernel into Ubuntu and have grub acknowledge the new installed kernel.

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  • Cannot install PC Tools firewall

    - by Philip
    I am unable to install PC Tools firewall..It is fine up until after rebooting then the PcTools icon in the system tray hangs and indicates it is "initializing." I have waited 5 minutes and no change. I have tried multiple times.The Vista firewall was turned off prior to attempting to the attempted installation. Help!Thank You

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  • what is best config for nginx worker_rlimit_nofile and worker_connections 28672

    - by Binh Nguyen
    i have issue of web-brower response ( especially on ie ) very slow, some time time out, and sometime hang out up to 20 seconds for one file redirect 301 when test with "f12 derverloper tool of ie" .. it report wait/start time very long. but after got connected the elements on web weill be dowload and show out fast ( test at xaluan.com ) It most happen when active user on web more than 2100 ( use google real time live analytic ). server running cenos 5 with ngix, apache, 32core cpu, 96G ram, raid 10 sas hdd.. == flowing is my config == user nobody; # no need for more workers in the proxy mode worker_processes 28; #old 32 #good at 24 error_log /var/log/nginx/error.log; #old add in end: info worker_rlimit_nofile 22528; events { worker_connections 22528; use epoll; # you should use epoll here for Linux kernels 2.6.x } http { server_name_in_redirect off; server_names_hash_max_size 10240; server_names_hash_bucket_size 1024; include mime.types; default_type application/octet-stream; server_tokens off; disable_symlinks off; sendfile on; tcp_nopush on; tcp_nodelay on; server_name_in_redirect off; server_names_hash_max_size 10240; server_names_hash_bucket_size 1024; include mime.types; default_type application/octet-stream; server_tokens off; disable_symlinks off; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 25; #old 5 gzip on; #old on gzip_vary on; gzip_disable "MSIE [1-6]\."; gzip_proxied any; gzip_http_version 1.1; gzip_min_length 1000; gzip_comp_level 6; gzip_buffers 16 8k; ignore_invalid_headers on; client_header_timeout 1m; #3m client_body_timeout 1m; #3m send_timeout 1m; #3m reset_timedout_connection on; connection_pool_size 256; client_header_buffer_size 256k; large_client_header_buffers 4 256k; client_max_body_size 100M; client_body_buffer_size 256k; request_pool_size 32k; output_buffers 4 32k; postpone_output 1460; proxy_temp_path /tmp/nginx_proxy/; client_body_in_file_only on; log_format bytes_log "$msec $bytes_sent ."; limit_conn_zone $binary_remote_addr zone=limit_per_ip:1m; limit_conn limit_per_ip 20; limit_req_zone $binary_remote_addr zone=allips:5m rate=200r/s; limit_req zone=allips burst=200 nodelay; include "/etc/nginx/vhosts/*"; } =========== I have play around with worker config 1- tried increase as some one suggess: worker_rlimit_nofile = worker_connections = worker_processes * 1024 = 32768 2- tried to set low: worker_processes = 28 and other worker at 22582 and other solution too .. but not work cause some time it make server load hight very quick 3- tried to comment out the # worker_rlimit_nofile . so it will be unlimited. it look like solved a bit about issue response time. but it also make server high load quick in peak time... Please help thanks PS: other apache you may have look for help me out thanks Listen 0.0.0.0:8081 User nobody Group nobody ExtendedStatus On ServerAdmin [email protected] ServerName server.xaluan.com LogLevel warn # These can be set in WHM under 'Apache Global Configuration' Timeout 100 TraceEnable Off ServerSignature Off ServerTokens ProductOnly FileETag None StartServers 15 <IfModule prefork.c> MinSpareServers 20 MaxSpareServers 50 #MaxSpareServers 40 </IfModule> ServerLimit 1572 MaxClients 1572 MaxRequestsPerChild 4000 # MaxRequestsPerChild 3000 KeepAlive On KeepAliveTimeout 3 MaxKeepAliveRequests 300 #MaxKeepAliveRequests 130

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  • WINDOWS 7 SOFTWARE PROBLEM

    - by PHILIP KIRK
    I am running Windows 7 and have adjusted something which has caused all of my shortcuts and program icons to show the same program namely Adobe Reader and when I click on any of the icon or shortcuts they only open Adobe reader, I have reinstalled Windows 7 But this has made no change, I posted this question yesterday but apparently with not enough information I hope this is better and someone can help.

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  • Ubuntu nasty error: The panel encountered a problem while loading xxxApplet

    - by Phuong Nguyen
    I have install ubuntu & GNOME (say, with minimum possible number of packages). I can login and do anything as I want. However, there is a nasty thing: Whenever I loggin in, I see this message: Error The panel encountered a problem while loading "OAFIID:GNOME_FastUserSwitchApplet" Do you want to delete the applet from your configuration [Don't Delete] [Delete] If I press [Delete] then the error won't be shown anymore. However, for every new created account, the message shown again (use created using sudo adduser user_name). Since I clone this OS into several virtual instance, and create new account on these instances. I wonder if there is a way to configure my ubuntu so that new created user don't have to see this annoy message? Thanks

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