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  • NAS device claims drive in a RAID is degraded but S.M.A.R.T. says it is fine

    - by Nathan Villaescusa
    I have a Synology DS213 with two 600GB drives in RAID 1. Last night the device reported that my second drive had become degraded and that I should replace it. When I ran a extensive S.M.A.R.T. test the results said that the drive is okay. How can I confirm that the drive is actually bad? Is there any case that the degraded drive is the good one and that it is actually the other drive that is bad?

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  • RAID 5 configuration and future expansion

    - by Alexis Hirst
    hi, I am building a PC to act as a file server among other things, and I was wondering whether it is a good idea to create 2 partitions on the RAID 5 array, one for OS one for data, or to have a separate disk for OS and use array for data. Also, one day i may want to add another disk to the array, so would there be any issues if I had the OS partition on the RAID5 array when it came to resizing the data partition?

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  • Is RAID 5 or SnapRAID the better alternative for a media server raid system?

    - by rubo77
    I am using a raid 5 system for my ubuntu 12.04 xmbc media server with 5 disks. Since the data isn't changing a lot and a total loss wouldn't be so bad, cause I have another backup anyway I am thinking about using SnapRAID It sais: SnapRAID is mainly targeted for a home media center, where you have a lot of big files that rarely change The main advantage for me would be power-saving, cause not all disks have to run all the time. Would you recomment using this? (with a regular resync script once a day)

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  • perf tuning for vmfs3 on RAID

    - by maruti
    recommendations for ESX4 OS - VMFS version3: matching: RAID-5 stripe size with VMFS block size? (64K, 128K etc) enabled "adaptive read ahead, write-back" on PERC 6i 90% VMs on server are Windows (2008, 2003, Vista etc, SQL 2005 etc) i have read that smaller stipes are good for writes and larger for reads. Since this is virtual env, not sure whats good.

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  • RAID clarification

    - by waiwai933
    Ok, I thought I understood RAID, but I'm looking at images from Wikipedia, and it doesn't seem like I do. For example, take this image: What does the 'parity' do? For example, what happens if Disk 2 suddenly fails? How does the system recover?

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  • Create image from RAID images

    - by myforwik
    I have 3 raw images of what was once a 3 disk RAID5 setup. The hardware has been lost and the configuration is unknown. Does anyone know of some software that can automatically detect the raid configuration and write a single image out?

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  • DegradedArray event on /dev/md0 without actually having a RAID

    - by J. Stoever
    Since I upgraded from Ubuntu LTS 10 to LTS 12, I have been getting error messages like: N 60 mdadm monitoring Mon Sep 3 06:38 31/1022 DegradedArray event on /dev/md2:Ubuntu-1004-lucid-64-minimal N 61 mdadm monitoring Mon Sep 3 06:38 31/1022 DegradedArray event on /dev/md0:Ubuntu-1004-lucid-64-minimal N 62 mdadm monitoring Mon Sep 3 06:38 31/1022 DegradedArray event on /dev/md1:Ubuntu-1004-lucid-64-minimal We do not have a RAID setup, and only have a single hard drive. Ideas ?

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  • Future raid update in a NAS and HP ProLiant alternatives

    - by edwardmlyte
    I'm thinking of buying the HP ProLiant MicroServer*. My question is if I just put a single 2TB drive, how easy would it be in the future to upgrade to a second 2TB drive in a RAID-1 setup? Can this be done without formatting the original 2TB drive? *It looks like the £100 cashback offer is stopping end of Aug, making this system cost around £260 without HDDs. Are there any other brands that anyone would recommend for all-in-one hardware solutions.

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  • Raid 5 GPT Partitioning

    - by user39325
    I have a Dell Poweredge r710 server with five 1 TB disks. All of them are in RAID 5. I was trying to install Centos but it says "Your boot partition is on disk using GPT Partition..." I read somewhere that centos can't install on a disk larger than 2TB, so I made some partitions smaller, but it's not working. PS, I am going to install Proxmox on that, but Proxmox also won't accept disks larger than 2TB.

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  • "Raid 0 SAS" versus "2nd generation SSD"

    - by Stefano
    Hi everybody, i was planning to buy a SAS system made of two 15k RPM disks in Raid 0 configuration to give a boost to my s.o. and my apps... but after i saw that article on Coding Horror, i've started to thinking if a new 2nd generation SSD could do the same job, or even better... Does anybody have any information to help me decide?

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  • How do I Change a damaged Disk in a Raid 5 array

    - by Egakagoc2xI
    Hi, I have a server with a 4-drives Raid 5 array; one of the disks is damaged. All the disks are hot pluggable. My Question is, I want to replace the damaged disk with a new one, do I have to shutdown the server or should I just change the hard disk with the server on and it will rebuild the array? There is a procedure to follow? My Server is a HP. Regards.

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  • How do i Change a Dammage Disk in a Raid 5

    - by Egakagoc2xI
    Hi, I have a 4 drives Raid 5 Server, which one of them is dammage, all drivers are hot plugged. My Question is, I Want to replace the dammage with a new one, Do I have to shutdown the server or just change the hard drives with the server on a it'll rebuild the every or there is a procedure to follow? My Server is a HP. Regards.

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  • Ubuntu server boot degraded raid

    - by beacon_bonanza
    I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third and fourth drives having md2 (/var). I've been testing the operation under a drive failure and found that the system boots fine if I remove disk two but if I remove disk one then the system gets to grub and then just restarts. I'm confused as to why grub appears to be loading properly from disk two but then the boot fails.

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  • RAID and Partitions, guidance Needed

    - by beauregarde
    Alright I have a Biostar TA790GX3A2+ Mobo 2x Seagate 750Gb Hard drive (with 2 different speeds) an X4 9750 A GeForce 9800GT and 2GB RAM Hardware Specs link text I want to configure my computer with partitions in various RAID arrays. The Partitions I know i want (disk letters are mostly for reference here) C: XP Boot D: XP Swap E: XP Run F: Games G: Data The Partitions I think I want (repeat caveat) H: small FAT for Win Legacy and DOS I: Linux J: Linux Swap K-?M?: Other Linux /whatever partitions N & O: Attic for D1 and D2 What I'd like to do, is have C: written on Disk 1 (D1),.. D: on D2,.. E: and F: striped on D1 & D2,.. G: mirrored or D1 & D2,.. I: on D2 (so i can just switch disc boot priority to open in Ubuntu),.. J: on D1,.. and H: somewhere low on D1 I am inexperienced with VMs, so i am unsure as to whether those run out of XP, or whether i need to reserve a primary partition for them. However, I think they would be preferable for testing new OS's to scheduling a partition for the same purpose. I'm also not married to XP, but -64 IS pretty important to me. QUestion Time 1) Ignoring the irrationality of it all, is such a configuration possible? If not, can some pseudo-approximation be achieved? 2) My RAID is software, isnt it? 3) How much should I short a 750GB HD? And should i use that space for my attics, or for my attics and something else, or for something else (.iso's perhaps?)? 4) if XP is striped on D1 & D2, will that interfere egregiously with my Swap writes on D2? If so, would striping both XP and Swap relieve (or at least mitigate) that issue? Should XP and Swap just be written normally on 2 different HDs? 5) Should I keep DL's and Drivers on E: (XP Run), F: (Games), or elsewhere? 6) Is 4GB enough for C:? 7) Is 30GB enough (or too much) for E:? 8) How much to reserve for the Linux and sub-Linux partitions? Also, where on the platter do you think i should put them? 9) Am I a fool to use FAT16 instead of FAT32 for H: because I'd rather run 95 than 98SE? If not, do you think 2GB or 4GB? 10) I cant predict what my Max Commit Charge will be, so recommendations for Pagefile size? 5GB? 12GB? 11) VMs, where do I run them? do they exacerbate anything? Would it be better to just emulate Linux, 95, and DOS? EC) What havent I considered that I really should? Notes: computer is mostly for playing games and watching media, though I wouldnt rule out the use of particularly blah-intensive anything.

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  • choosing the right RAID level

    - by student
    Recently, we bought a "HP-DL380 G6 Server" with 6 146GB (SCSI)HDD for our colleague course management application and website with 10000 daily visitors. we want to choose the best RAID level. how can we choose the right RAID level ? what is the best RAID level for our application ?

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  • Desktop PC Raid 5 or JBOD?

    - by Sean Lim
    I have a desktop PC and I want to get alot of space for movies, music, and pictures. I probably will not be deleting files. I am running Windows 7 on my system. It is kind of silly I just want the physical drives to be labeled as a single letter drive. And probably map my video, documents, pictures and music on that single drive. The main reason I considered RAID 5 because I would be lazy to get the data I lost and hopefully that if I get a new drive, it would rebuild it. So my question is which would be better? A second question is can I get RAID card that has only 2 internal connectors and still do RAID 5? or do I have to get a RAID card that has 4 internal connectors.

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  • growing EBS RAID volume

    - by Ryan Fernandes
    I've created a RAID0 configuration with two 1GB EBS volumes, mounted at /dev/md0 using mdadm and formatted with XFS Next, I copied some files over to fill the volume to around 30% of its capacity (of 2GB) I then created snapshots of the volumes using ec2-consistent-snapshot and created volumes of the said snapshots but specified the volume size to be 2GB (effective doubling the capacity on each disk) I then spun up a new instance, assembled the RAID0 configuration on /dev/md0 from the 2 volumes mentioned above and mount it to /vol df -hT showed /vol as 2GB (as expected) Now I ran sudo xfs_growfs -d /vol. The command completed normally but reported blocks changed from 523776 to 524160 (only!) and df -hT still showed /vol as 2GB (instead of the expected 4GB) I rebooted, remounted, reassembled the RAID but it still reports the old size. Any clue as to what went wrong?

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  • 3ware RAID in Windows 7

    - by scribbles
    Just moved a 3ware 9500S-8 raid card and a few drives from my linux box into my win7 box. Windows Updates picked up the 3ware driver and installed it. After a reboot I checked Disk Management and it shows the array as one solid drive with the correct size. The only issue is that its not assigned a drive letter and when I right click on it my only option is to Convert to Dynamic Disk... From what I've read this is not something I want to do. What are my options?

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  • Installing raid controller forces reinstall of Windows Server 2008

    - by Tyler
    So, I've tried two different RAID controllers that have external SATA connections on my Server 2008 machine. I can install the hardware, boot into Windows, install the drivers and reboot again. No problems. However, as soon as I try to use eSATA-connected drives and reboot something happens to the Windows install and I can no longer boot into Windows. I tried repairing from the command line, and the end result is that repair console tells me I have 0 Windows installations (?). I end up having no choice but to reinstall Windows to get back on track. I must be doing something fundamentally wrong here, but I don't know what :(

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  • RAID Array performance on an HP Proliant ML350 G5 Smart Array E200i

    - by Nate Pinchot
    We have a client who is complaining about performance of an application which utilizes an MS SQL database. They do not believe the performance issues are the fault of the application itself. The Smart Array E200i RAID controller has 128MB cache and we have the cache set to 75% read/25% write. The disk array set to enable write caching. Recently we ran a disk performance test using SQLIO based on this guide. We used a 10 GB file for the test found that the average sequential read rate was ~60 MB/sec (megabytes/sec) and the average random read rate was ~30 MB/sec. Are these numbers on par for what the server should be performing? Better than on par? Horrible? Amazing?

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  • How to set up RAID 1 on Dell PERC S300 With Existing OS Install

    - by Daniel Dugger
    We have a server that is being used in production, but it was not originally meant to. The main thing I want to add to it is a Dell PERC S300 RAID Card to have the main hard drive (Windows Server 2008 R2) mirrored on another hard drive. I can not initialize the disk and wipe the the OS to create the array and then re-install. Is there a way to create the array with a current hard drive, without affecting it, and just mirroring the drive? If that card is not an option, is there a card that would allow that? The server is a Dell PowerEdge T110 II.

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  • 3ware RAID in Windows 7

    - by user36484
    Just moved a 3ware 9500S-8 raid card and a few drives from my linux box into my win7 box. Windows Updates picked up the 3ware driver and installed it. After a reboot I checked Disk Management and it shows the array as one solid drive with the correct size. The only issue is that its not assigned a drive letter and when I right click on it my only option is to Convert to Dynamic Disk... From what I've read this is not something I want to do. What are my options?

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