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  • Resize a RAID 1 volume on OSX Snow Leopard - how? (Note: software raid)

    - by Emmel
    I've scoured the Internet in search of an answer to this question, and as usual with OSX-related topics, I often don't find any deep-dive technical explanations sufficient enough to feel confident doing dangerous things. Here is my question: I have a Mac Pro, running OSX 10.6.2. I have, as my main root/boot disk, a RAID 1 volume called "Mirror1". Mirror1 is comprised of two 1 TB disks. Mirror1, however, is fixed at 640 GB. That's because, I originally took a 640GB disk, bought a terabyte disk, mirrored it (using diskutil appleraid enable...), when it synced I removed the 640GB and replaced it with a second 1 TB disk, and synced again. Voila! A single 640 GB replaced by two 1 TB disks in a mirror.. Actually, no. There's still something missing from the equation: Mirror1 needs to be expanded from 640GB to 1 TB to match the partition sizes on each of those disks. How do I do this? Perhaps the diskutil output will help: -> diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI 209.7 MB disk0s1 2: Apple_RAID 999.9 GB disk0s2 3: Apple_Boot Boot OSX 134.2 MB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 1: EFI 209.7 MB disk1s1 2: Apple_RAID 999.9 GB disk1s2 3: Apple_Boot Boot OSX 134.2 MB disk1s3 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *640.1 GB disk2 1: EFI 209.7 MB disk2s1 2: Apple_HFS Mac Disk 2 536.7 GB disk2s2 3: Microsoft Basic Data BOOTCAMP 103.1 GB disk2s3 /dev/disk3 #: TYPE NAME SIZE IDENTIFIER 0: Apple_HFS Mirror1 *639.8 GB disk3 -> diskutil appleraid list AppleRAID sets (1 found) =============================================================================== Name: Macintosh HD Unique ID: 1953F864-B474-4EB6-8E69-41834EBD0247 Type: Mirror Status: Online Size: 639.8 GB (639791038464 Bytes) Rebuild: manual Device Node: disk3 ------------------------------------------------------------------------------- # Device Node UUID Status ------------------------------------------------------------------------------- 0 disk1s2 25109BAE-5697-40EA-B612-0217851444F7 Online 1 disk0s2 11B83AB0-8148-4DB6-8761-DEF08C855F8D Online =============================================================================== Thanks in advance.

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  • How to reinstall bootloader after migration to SSD

    - by hijarian
    I must say, it was difficult to name this question. Basically, I need to properly reinstall the bootloader on my system, because I already have the working system disks for my OSes. The long story is this: I had the large slow HDD with Windows7 & Debian Wheezy dual-boot on it, perfectly bootable. Then, I ordered the SSD drive and prepared my system partitions to fit onto the much smaller SSD. I wanted the following schema: 128 GB Windows 24 GB / on Debian 86 GB /home on Debian Strange size for /home because there's no such thing as true 256GB disk drive. So, I've prepared such a partitions on my initial HDD and installed the new SSD and then I loaded the GParted live USB (can't remember now how it was really named), and then just copypasted the partitions from HDD to SSD. So, now I have the following partitions across the physical disks: SSD 128 GB copy of original Windows partition 24 GB copy of presumably Debian / 86 GB copy of presumably Debian /home HDD 128 GB Windows 24 GB / on Debian 86 GB /home on Debian ... several other partitions with non-system data ... And the behavior of the system right after the Ctrl+C, Ctrl+V in GParted was as follows: no GRUB, system boots right into the Windows on HDD. In BIOS settings are to boot from SSD first. I managed to create the Debian Testing installation USB and loaded it into the rescue mode, found that it identified my SSD as /dev/sda and installed the GRUB to the /dev/sda. Now my system loads the GRUB which lists both Windows and Debian. From HDD. So, I am now back into initial position. Please, how I should set up the GRUB so it'll load the OSes correctly from SSD? Should I fire up my Debian, fiddle with the GRUB's config and reinstall it again to the same place (at SSD)?

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  • How do I get the file size of a large (> 4 GB) file?

    - by endeavormac
    How can I get the file size of a file in C when the file size is greater than 4gb? ftell returns a 4 byte signed long, limiting it to two bytes. stat has a variable of type off_t which is also 4 bytes (not sure of sign), so at most it can tell me the size of a 4gb file. What if the file is larger than 4 gb?

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  • Server 2008 R2 - Boot disk RAID 1 - migrate to larger disk

    - by William Hooper
    My group inherited several 2008 R2 servers with single 70GB RAID 1 boot/system disks. No other disks in the servers. We need larger boot / system disk. Plan is : to replace one disk with new 500 GB drive wait for resync replace other smaller disk with 2nd 500 GB drive wait for resysnc Now I should have 500 GB RAID 1 with original 70 GB partition Then I would like to extend the 70 GB partition to 200 GB and add D: drive partition with remaining 300 GB Can the above be done using Windows Disk Management and / or Windows DiskPart ?

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  • Page File - Why set one for each drive?

    - by Magic
    Hello, I have Windows Vista Business Edition running on my laptop (brand is HCL). I have 4 HDD which are as follows - C - 29.2 GB (of which only 3.68 GB is free) D - 39 GB (of which 37.8 GB is free) E - 39 GB (of which 37.3 GB is free) F - 41.6 (of which 41.4 GB is free) However, my page file settings are as below. Automatically manage paging file for all drives. Question - Why should I set one for each drive? Should I set my page file on the OS Root Drive. I happen to talk to a System Administrator in an IT company and he advised that we should never set the page file on the OS drive but on an alternate drive wherever possible. It would be really helpful, if you can guide me here or at least point me to the right resources so that I can read about paging and best practices of paging. Cheers,

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  • Free / Cached / Available memory on Linux

    - by pkoraca
    I have read that linux uses free memory for caching, to make system faster. However, both Nagios and Paessler PRTG monitoring system show me that my memory usage is critical. I could change Nagios mem_usage script to sum free and cached memory, but would that be correct information? I doubt that they misunderstood Linux memory usage. Lets say I have 8 GB RAM. 5 GB are used, 2 GB is cached, and I have 1 GB of free memory. Real available memory should be free+cached (3 GB)? If some new application would need additional 3 GB RAM, could it take everything from cache and free without using swap, or is there a minimum that should be in cache? Real example: $ cat /proc/meminfo MemTotal: 5984256 kB MemFree: 137052 kB Buffers: 140484 kB Cached: 3439616 kB SwapCached: 244 kB Active: 3148824 kB Inactive: 2341768 kB ... My monitoring tools show that I have 137 MB free RAM, however I have ~3,5 GB in Cache. Thanks!

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  • VPS showing low disk space despite there is nothing major on it

    - by SheoNarayyan
    Hello experts, On my VPS server I was trying to see the used disk space and when I open My Computer it shows 17.9 GB free out of 39.8 GB it means that 21.9 GB space is used. However, when I select all files and folders from C: and try to see the total size, it just count approximately 11 GB. The difference is around 10 GB. Where is this 10 GB going if I have not stored anything else here? I asked above question from my VPS provider and he responded below Check hidden files/system files/etc. This is default windows OS and its utilization and not specific to setup. If you want specifics of usage, you can go ahead and get in touch with Microsoft support team and they'll provide you with exact specification of the same. I am sure that Windows OS must not be taking up 10 GB space for hidden files and folders. My VPS has Windows Server 2008 R2 installed. Can anyone help me in this on who is right?

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  • What will Time Machine do when

    - by Joel Budgor
    When Time Machine says "I will delete the oldest files first" does it mean this literally. Here is a theoretical example. Source Drive: 300 GB, consisting of 1 280 GB file and a 1 GB file. Backup Drive: 300 GB The initial backup will backup both files, using 281 GB. If I modify the 1 GB file 21 times, what will Time machine do when I run out of room on the backup drive; Delete the original 280 GB because it is the oldest file or delete the oldest version of the file I have modified 21 times. I hope it would delete the oldest version of the file I have modified 21 times, but I want to be sure. Thanks, Joel Budgor

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  • Windows 8 Task Manager RAM Usage Accuracy

    - by user264892
    The new Task Manager has a great UI in windows 8, however, there are some discrepancies in the data I can not account for: Machine: 8 GB of total ram. (This is a physical machine, not a virtual) The processes tab shows 45% of Memory utilized. The listed process do not add up to 3.5 GB of RAM, but instead add up to 0.948 GB. There is no "processes for all users" option. The performance Tab Shows: In use : 3.6 GB Available: 4.4 GB Committed : 4.1 /9.2 GB Cached: 3.7 GB Paged Pool: 376 MB Non-paged pool: 135 MB My reading of this says I have ALOT of "cloaked" processes running some where eating my ram. How do I interpret this data and how do I verify it?

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  • MS Access vs SQL Server and others ? Is it worth taking a db server when less than 2 Gb and only 20

    - by asksuperuser
    After my experiment with MSAccess vs MySQL which shows MS Access hugely overperforming Mysql odbc insert by a factor 1000% before I would do the same experiment with SQL Server I searched for some other's people and found this one: http://blog.nkadesign.com/2009/access-vs-sql-server-some-stats-part-1/ which says "As a side note, in this particular test, Access offers much better raw performance than SQL Server. In more complex scenarios it’s very likely that Access’ performance would degrade more than SQL Server, but it’s nice to see that Access isn’t a sloth." So is worth bother with some db server when data is less than 2 Gb and users are about 20 (knowing that MS Access theorically supports up to 255 concurrent users though practically it's around a dozen concurrent users only). Are there any real world studies that really compare MS Access with other db in these specific use case ? Because professionaly speaking I keep hearing people systematically recommend DB server from people who have never used Access just because they think DB Server can only perform better in every case which I used to think myself I confess.

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  • Can dd-wrt or tomato keep track of GB usage per billing period per device?

    - by Sam Hasler
    I want to be able to track the usage of each device connecting to our router so we can split up the ISP bill by usage. Can dd-wrt or tomato provide the stats I'd need to do this? Update: After a bit of googling I'm aware of a much better answer than the current one. However I suspect there's probably more answers out there for other firmwares so in the interests of getting a more diverse set of answers—­and, I'll admit, because I'm getting tired of reading through obtuse firmware documentation—I've put up a bounty. If the only answer added is the one I've found I'll be happy to accept it for the bounty, otherwise I'll add it and accept it myself, but I'm hoping for an even better answer, or at least some options for other firmwares as from looking I've seen a few other people have asked for this and there doesn't appear to be a definitive answer, let's make this it! Go lazywebs! (Sorry. I've always wanted to say that.)

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  • Would Windows 8 may increase the Cap of more than 2 GB?

    - by Pisaro
    I have a old Laptop Dell Latitude D430 that I just upgraded to Windows 8. The Ram that I have installed is 2GB (Max Ram that this laptop can handle) but I am wondering if by installing windows 8 can help also to increase the cap of the total Ram that the laptop can handle. I know that some laptops have a cap of RAM by the Bios but I am wondering if any of you know if by installing a new OS can actually change this? thanks, Robert

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  • Add entire 300 GB filesystem to Git Annex repository?

    - by Ryan Lester
    By default, I get an error that I have too many open files from the process. If I lift the limit manually, I get an error that I'm out of memory. For whatever reason, it seems that Git Annex in its current state is not optimised for this sort of task (adding thousands of files to a repository at once). As a possible solution, my next thought was to do something like: cd / find . -type d | git annex add --$NONRECURSIVELY find . -type f | git annex add # Need to add parent directories of each file first or adding files fails The problem with this solution is that there doesn't seem from the documentation to be a way to non-recursively add a directory in Git Annex. Is there something I'm missing or a workaround for this? If my proposed solution is a dead end, are there other ways that people have solved this problem?

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  • migrate old bootable wd harddrive to new 500 gb hd which was just used for storage and has stored programs on it , id like 500gb to be botable

    - by tom
    id appreciate any help in this matter this is in laptop with 2 harddrive bays. i have a wd scorpio that has become 2 small its bootable with windows 7, i have pretty new 3 months old hitachi hd500gb i was using for storage-backup of programs it is not bootable and id like to make it that way without losing saved backed up info on it is there any way to do this, id like to keep only 500gb bootable hard drive due to weight of laptop its 10.lbs desktop replacement gateway p-7805u thanks for your help in advance on this matter, tommy

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  • Is 10% too much for autogrow on a 4 GB sql server DB?

    - by ntsue
    I am getting the following error: 2011-03-07 21:59:35.73 spid64 Autogrow of file 'MYDB_DATA' in database 'MYDB' was cancelled by user or timed out after 16078 milliseconds. Use ALTER DATABASE to set a smaller FILEGROWTH value for this file or to explicitly set a new file size. I did some research, and I found that for large databases you should set autogrow to a fixed size (MB), and not to a percentage. I feel like this database is not large and I may not be addressing the correct issue by changing this value. Does anyone have any opinions? Thank you! EDIT: I should have specified SQL Server 2008 RC2 running on Windows Server 2008

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  • how to use gparted to partion 2 drives as 1

    - by user281745
    I have my lenovo t43 and I have a SATA extra HD drive instead of the CD drive and I have in it a 250 GB hard drive and in my HD caddy I have a 40 GB hard drive I would like to use gparted to partition these 2 drives as 1 i would like to have the 250 GB as a extended part of the 40 GB cause i already have Ubuntu Installed on it, they are right now not side by side im not sure how to do this so please list by step by step thank you http://imgur.com/dE0B7dy,qRRPgoB http://imgur.com/dE0B7dy,qRRPgoB#1

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  • How to Install Ubuntu by Replacing windows but without formatting other partitions

    - by Valmik Kalathia
    I'm using Windows 7 on my PC (1 GB RAM,160 GB HDD). I want to install Ubuntu and remove Windows 7 I have Partitioned my PC into 2 drives , C Drive - 40 GB and D Drive - 120 GB. I want to install Ubuntu on C drive without formatting D drive so how can I do that ? I know that I will have to select "Something Else" option when Installation Type Screen appears but I don't know how to install Ubuntu in C drive after clicking on "Something Else Button".My question looks kinda similar to this question but its not

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  • How to have 3 operating systems on a mirror RAID 1.

    - by Chris_45
    How do one proceed if I want to have 3 Operating Systems: Windows 7, Ubuntu, Debian plus a swap partion, all in all 4 partitions? Lets say I have 2 disks, each 640 GB and make room - 300 GB for Windows 7, 160 GB Ubuntu, 160 GB Debian and the rest for swap 20 GB. Where do I make these partitions, do I first make one big raid array 1 in BIOS and then partition when Windows 7 is installed or do I already in BIOS make these 4 partitions?

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  • Cannot reactivate RAID-5 volume: The size of the plex member is invalid

    - by Ian Boyd
    We had a 3-drive Windows Server 2008 R2 RAID-5 fail (operating in redundancy mode): WDC 1 TB WDC 1 TB WDC 1 TB We removed the failed hard drive, and put a WDC 1 TB drive (that we had standing by) into the machine. When launched, Disk Manager, asked permission to "initialize" the disk as either: Master Boot Record (MBR) Guid Partition Table (GPT) We initialized the disk as GPT, converted it to dynamic, and tried to use the Repair Volume command - except it was greyed out. (which is a terrifying thing on a failed production server hosting 3 virtual servers) i tried from the diskpart command line tool. First we look for our RAID-5 volume that is in Failed Rd mode: DISKPART> list volume Volume ### Ltr Label Fs Type Size Status Info ---------- --- ----------- ----- ---------- ------- --------- -------- Volume 0 E VMs (Raid5) NTFS RAID-5 1863 GB Failed Rd Volume 1 D DVD-ROM 0 B No Media Volume 2 System Rese NTFS Partition 100 MB Healthy System Volume 3 C NTFS Partition 1862 GB Healthy Boot There, Volume 0. Make that our active context: DISKPART> select volume 0 Volume 0 is the selected volume. Now we need to find the disk we will be repairing the volume with: DISKPART> list disk Disk ### Status Size Free Dyn Gpt -------- ------------- ------- ------- --- --- Disk 0 Online 931 GB 0 B * Disk 1 Online 931 GB 931 GB * Disk 2 Online 1863 GB 0 B Disk 3 Online 931 GB 0 B * Disk M0 Missing 0 B 0 B * The disk with 931 GB free, Disk 1. Now we just need to repair the volume: DISKPART> repair disk=1 Virtual Disk Service error: The size of the plex member is invalid.

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  • Where is my free space?

    - by Andrey
    A week ago I got a low disk space warning on my Vista x64 Ultimate box - 60 Mb free on the disk C; I cleaned up some downloaded msdn images and got 20 Gb freed up. Three days ago I got another notification, it looked suspicious but I didnt have time to deal with it and just moved some heavy stuff to another drive to free up about 17 Gb.... Today morning - 53Mb left on drive C, again! Now it looks really suspecious, so I downloaded TreeSize to see what's taking up the space, just to see it reporting only 121 GB out of 200 GB used, in other words I suppose to have about 79 Gb free. Then I went to Folder Options, enabled viewing of system and hidden files, rerun teh tool to see another 5 Gb added (which is expected). Then I open disk C in windows explorer, select all and right click Properties, to see it reporting teh same amount of files - 126 Gb. But when I look at Drive C properties, it reports that 200GB of 200 Gb are taken. I just scanned the drive with two different antiviruses - Symantec and AVG and found no viruses... I'm a little confused at this point, any ideas where is my free space, woudl be highly appreciated! Thank you! Andrey

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  • Adding third disk as a single disk in a server with an existing RAID1

    - by slowhandsolo
    I've got a ProLiant DL360 G5 server (Fedora 13) with two SAS disks in a hardware RAID 1, working fine. Now I hot plugged another SAS disk. I'd like to configure this new hard disk out of my RAID, as a single non-RAID disk (ex. /dev/sdb). Even after rebooting the server, I can't see the new disk with "fdisk -l". It displays only my hardware RAID, but not the new disk. [root@myserver]# fdisk -l Disco /dev/cciss/c0d0: 300.0 GB, 299966445568 bytes Disposit. Inicio Comienzo Fin Bloques Id Sistema /dev/cciss/c0d0p1 * 1 126 512000 83 Linux /dev/cciss/c0d0p2 126 71798 292422656 8e Linux LVM Disco /dev/dm-0: 234.9 GB, 234881024000 bytes Disco /dev/dm-1: 10.5 GB, 10536091648 bytes Disco /dev/dm-2: 21.0 GB, 20971520000 bytes Disco /dev/dm-3: 31.5 GB, 31474057216 bytes Disco /dev/dm-4: 1577 MB, 1577058304 bytes However, I can see the new disk using the HP Array Configuration Utility CLI for Linux "hpacucli": [root@myserver]# hpacucli => controller slot=0 physicaldrive all show status physicaldrive 1I:1:1 (port 1I:box 1:bay 1, 300 GB): OK physicaldrive 1I:1:2 (port 1I:box 1:bay 2, 300 GB): OK physicaldrive 1I:1:3 (port 1I:box 1:bay 3, 300 GB): OK => controller slot=0 pd all show detail Smart Array P400i in Slot 0 (Embedded) array A physicaldrive 1I:1:1 Port: 1I Box: 1 Bay: 1 physicaldrive 1I:1:2 Port: 1I Box: 1 Bay: 2 **unassigned** physicaldrive 1I:1:3 Port: 1I Box: 1 Bay: 3 Status: OK Drive Type: **Unassigned Drive** As you can see, I've got two SAS disks in a RAID 1 and the new disk as "unassigned". Is there any way to work with the new disk as another non-RAID single disk? If relevant, I want to create a new partition in my new disk, format it with mkfs and mount it, but as I can't see it with fdisk, I don't know how to do it. Thanks!

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  • VirtualBox doesn't see raw partitions

    - by smbear
    What I want to achieve is to set up virtual machine with VirtualBox. Host OS is Windows 7 Home Premium, guest will be (k)Ubuntu 12.04 on a raw partition. The first problem is that when I issue following command: VBoxManage.exe internalcommands listpartitions -rawdisk \\.\PhysicalDrive0 I get following result: Number Type StartCHS EndCHS Size (MiB) Start (Sect) 1 0xee 0 /0 /1 1023/254/63 715404 1 I'm guessing that VirtualBox is unable to see my partitions. If I use diskpart tool, then all partitions are listed correctly (note Polish language version of Windows): DISKPART> select disk 0 Obecnie wybranym dyskiem jest dysk 0. DISKPART> list partition Partycja ### Typ Rozmiar Przesuniecie ------------- ---------------- ------- ------------ Partycja 1 System 200 MB 1024 KB Partycja 2 Zarezerwowany 128 MB 201 MB Partycja 3 Podstawowy 139 GB 329 MB Partycja 5 Nieznany 4883 KB 140 GB Partycja 6 Podstawowy 50 GB 140 GB Partycja 7 Podstawowy 484 GB 190 GB Partycja 4 Odzyskiwanie 24 GB 674 GB Additional note: my PC is using EFI to boot OS. Basing on the results listed above, I believe that: I messed up with my partition table. Something is wrong with VirtualBox. Can anyone help with this issue?

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  • RAIDs with a lot of spindles - how to safely put to use the "wasted" space

    - by kubanczyk
    I have a fairly large number of RAID arrays (server controllers as well as midrange SAN storage) that all suffer from the same problem: barely enough spindles to keep the peak I/O performance, and tons of unused disk space. I guess it's a universal issue since vendors offer the smallest drives of 300 GB capacity but the random I/O performance hasn't really grown much since the time when the smallest drives were 36 GB. One example is a database that has 300 GB and needs random performance of 3200 IOPS, so it gets 16 disks (4800 GB minus 300 GB and we have 4.5 TB wasted space). Another common example are redo logs for a OLTP database that is sensitive in terms of response time. The redo logs get their own 300 GB mirror, but take 30 GB: 270 GB wasted. What I would like to see is a systematic approach for both Linux and Windows environment. How to set up the space so sysadmin team would be reminded about the risk of hindering the performance of the main db/app? Or, even better, to be protected from that risk? The typical situation that comes to my mind is "oh, I have this very large zip file, where do I uncompress it? Umm let's see the df -h and we figure something out in no time..." I don't put emphasis on strictness of the security (sysadmins are trusted to act in good faith), but on overall simplicity of the approach. For Linux, it would be great to have a filesystem customized to cap I/O rate to a very low level - is this possible?

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