RAID (redundant array of independent disks, originally redundant array of inexpensive disks[1][2]) is a storage technology that combines multiple disk drive components into a logical unit. Data is distributed across the drives in one of several ways called "RAID levels", depending on what level of ...

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Are ext4 RAID5 tuning options useful under LVM?

I'm setting up a system with a system with a mdadm RAID5 which is the sole PV for a VG which hosts 4 LVs. When I make the filesystem, would the mkfs.ext4 -E option be useful? Or is its effect not ...
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47 views

Age of hard drive via software tool on Windows 7

I an running Intel Raid 5 on Windows 7, and one of my hard drives is reporting an error. This is the second time I've had a hard drive error, and last time I replaced the problem drive. Now I've had ...
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1answer
90 views

Is my server toast?

Last night I received an e-mail from mdadm about the possible failure of two drives on my array. The raid array was set up as a 4 2TB drive raid5 with one hot spare. Is this system truly fried? Did ...
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3answers
447 views

Convert RAID 5 to RAID 10 without data loss

I have a Windows SBS 2011 server on a Dell R610 with RAID 5 configuration [3 disk]. Is there a way to convert it to RAID 10[4 or 6 disk] without losing anything or needing to re-install the whole OS ...
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3answers
216 views

Raid 0, Raid 1, Raid 5, Raid6, Raid 10 Read/Write performance? [duplicate]

Assume a single disk has a baseline of 1W & 1R performance, how does the different RAID configurations behave? My initial guess: Raid 0: 2W 2R Raid 1: 1W 2R Raid 5: ? ? Raid 6: ? ? Raid 10: ...
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1answer
135 views

Can I recover data from a RAID5 after accidental changed of disk order? [closed]

An intern yesterday accidentally changed the disk order, now we get there error, "Following containers have missing required members and cannot be configured. Container #0 RAID-5" Then no boot device ...
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1answer
91 views

Setup 1x RAID5 array with multiple LVs and differnt filesystems?

Centos 5.9 - 2.6.18-348.3.1.el5 i686 Raid5 - 4 Disks + 1 Spare (all WD RED 3TB) Does it make sence to create multiple LV within the same VP and configure them as differnt filesystems: Example: LV1: ...
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2answers
283 views

Proliant Server E200i Raid Controller does not see array

Help! My server was configured with 3 arrays: array 1 and 2 were each 136Gb raid 5 using the first 5 drives. 3 x 72Gb and 2 x 300Gb. Array 3 was 3 x 500Gb using drives 6 7 8 for 1Tb. I had a ...
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1answer
284 views

RAID: replacing a disk before it fails

We have a RAID 5 setup (Megaraid SAS ROMB) with 4 930 Gb physical disks running as a 2.7 TB VD. Recently (a few months back) we had a drive fail and had to leave it in degraded mode for ages (various ...
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3answers
141 views

Migration of HDDs in RAID 5 from a P410 Controller (Urgent)

I'm kind of totally lost right now. I have a server with a P410 Controller (256 Mb) and 4 Drives in RAID5. The server don't start :/ I need to find a solution in emergency, but don't know wich one ? ...
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1answer
177 views

Missing 2 Disk out of software RAID 5

I have a Debian squeeze installation with 6x 3TB Disks. On the SW RAID5 are 4 partitions. First for gpart BIOS, RAID 1 for "/", RAID5 for swap and the biggest part RAID5 for files. While the ...
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3answers
140 views

Can I remove and test hard drive from Raid5 controller without rebuilding?

I have a new PowerEdge T320: Intel Xeon E5-1410 @ 2.8 GHz 16GB Windows Server 2008 r2 configured as Domain Controller Dell PERC S110 Software Raid 4x 7200 rpm 1TB drives configured in Raid5 I have ...
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2answers
562 views

Is 5MB/s a reasonable speed for Dell Software Raid Controller in Raid5

I have a new PowerEdge T320. Details are: Intel Xeon E5-1410 @ 2.8 GHz 16GB Windows Server 2008 r2 configured as Domain Controller Dell PERC S110 Software Raid 4x 7200 rpm 1TB drives configured in ...
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1answer
123 views

How to resize Windows partition after conversion from RAID 1 to RAID 5?

I'm using Fujitsu PRIMERGY RX200 S6 with RAID controller RAID Ctrl SAS 6G 5/6 512MB (D2616) I've migrated RAID 1 (2 discs) to RAID 5 (4 discs) without any problems and on the fly without restarting ...
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1answer
87 views

how to Recovery RAID 5 storage that deleted array by console [closed]

I have A IBM DS3400 Storage this storage deleted array by console command. My Question is how to Recover data From this storage. thank all.
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1answer
182 views

Linux mdadm RAID5 data recovery with one drive failed, one drive failing

Improbably I had two drives fail in the same Raid5 array within 2 weeks of one another. Which means the array is dead. Yes yes hot spares not being lazy about replacing the failed drive I know. But ...
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0answers
155 views

raid 5 mdadm drive dropped whilst growing

I have a 4x 2tb raid 5 mdadm array which I had begun to grow onto a 5th disk. ~# mdadm --add /dev/md1 /dev/sdb ~# mdadm --grow /dev/md1 --raid-devices=5 midway through the grow I recieved this in ...
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1answer
136 views

Building recovery plan for HP DL380 G7 server [duplicate]

Possible Duplicate: Disaster recovery plan development best practicies or resources? I need your help to find out best practice to maintain my server and be ready for any kind of disk error ...
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0answers
68 views

Is it possible to perform a clean install without losing software RAID 5 data?

I have a machine running Ubuntu 12.10. It has 3 1TB drives running software RAID 5 (each drive has a main,and swap partition. 3x main partitions are raided and mounted as /, 3x swap partitions are ...
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1answer
266 views

Failing disks in RAID array - strategy suggestions required

I have a linux based software RAID 5 array. SMART has just started to send me emails complaining that one of the 5 disks has a Current Pending Sector Count of 9 and also an Offline Uncorrectable Count ...
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1answer
320 views

RAID-5 or RAID-6 - is RAID-5 really that bad? [duplicate]

Possible Duplicate: Which is better: RAID5 + 1 Hotspare / RAID6? I need to decide myself between RAID5 and RAID6. The servers have a hardware-RAID controller and 6 drives each. The ...
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1answer
59 views

Arch Linux on Software RAID, can't find VolGroupArray

I am trying to install Arch Linux on a Software RAID that I am building following their instructions on the Wiki. I built as far as the Logical Volumes and after that switched to the Installation ...
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1answer
175 views

Dell Perc 6i raid5 array: replace drives and expand VD?

I have a Dell T300 with a Perc 6i, to which 3 500Gb drives are connected. The are assembled into a raid 5 ~1000Gb VD. This setup is working fine, however system is filling up and I would like to ...
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1answer
92 views

Migrate Windows Dynamic disk RAID5 to Linux LVM

Is this even possible, do I have the right tool in mind? I have 3 disks that are running as a software RAID5 using windows. I would like to migrate box to Linux without experiencing data loss. Am I ...
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3answers
5k views

How to replace failed drive in RAID 5 array in HP DL380 G4 server

Sorry for not providing more information when I previously posted this question. More detail is provided below. Any feedback would be welcome. I have a HP DL380 G4 2U server which has 6 drive scsi ...
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1answer
880 views

2 Disks lost from RAID5 on P212! How can I recover the array without losing data? [duplicate]

Possible Duplicate: All servers flooded by salt water, is it possible to recover data from multi-platter drives? I am an individual user of HP P212/Zero Memory Smart Array Controller and I ...
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2answers
333 views

Windows Server 2008 Software Raid 5 - Data integrity issues

I've got a server running Windows Server 2008 R2, with a (windows native) software raid-5 array. The array consists of 7x 1TB Western Digital RE3 and RE4 drives. I have offline backups of this array. ...
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2answers
535 views

Proxmox and PXE boot

I have 10 rack servers, each has an 80 GB hard drive, and a Dell PowerVault with no hard drives. It is possible to take all these hard drives and put them in the PowerVault cluster, then boot proxmox ...
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0answers
76 views

Single drive LVM to RAID6 LVM

I cloned my entire LVM volume group from a single drive to a RAID5 array with 3 disks. The VG is formed by these logical volumes: root swap home ... and other volumes of some XEN virtual machines. ...
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1answer
102 views

Reshape linux md raid5 that is already being reshaped?

I just converted my RAID1 array to a RAID5 array and added a third disk to it. I'd like to add a fourth disk without waiting fourteen hours for the first reshape to complete. I just did this: mdadm ...
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2answers
586 views

Terminal Server disk performance

Our users experience slow session performance at times during normal work hours. Applications (IE, Office Apps etc.) are slow to respond so is switching between them. This problem happens sporadically ...
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1answer
249 views

Manually recovering a RAID5 array, how to approach?

Basic situation: I'm looking to manually reconstruct a RAID5 array for which the controller has lost the configuration. To complicate matters, the volume is encrypted with full disk encryption (to ...
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1answer
383 views

BAD stripes in controller and windows utility to remap bad blocks

Ok, here is my story. I have 3 disks raid 5, one of the disks made a few surface errors and I didn't know. I tried to repair the corrupted database table in mysql and the machine froze on write. I ...
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1answer
226 views

Completely replacing (upgrading) a RAID 5 array of disks on an ESXi server

I have a development server that runs several VM on ESXi 5. It has an array of disks in the RAID 5 configuration where all of the disks are currently the same size. I would like to expand storage on ...
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2answers
878 views

HP MSA60 complains that new drives are faulty

We got some replacement drives from HP PN 454273-001 1TB 7.2k drives. We put them into the msa. It completes rebuild but when we run the hp insight diagnostics tests. It comes back as read write error ...
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1answer
156 views

Do I need to rebuild the array after putting in a new hot spare?

So my experience with RAID is minimal. So I figured I'd come and ask here. We have a 16 drive RAID system that have 15 drives in RAID 5 with a hot spare left over. Recently one of the drives in the ...
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2answers
664 views

Reusing Raid 5 Drive?

We have two servers (ML530 G2 and DL380G2) w/ identical HP 10K RPM SCSI drives w/ a raid 5. One is decommissioned and the other will be decommissioned shortly. However, one of the drives on the ...
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1answer
357 views

Risky to have RAID5 with 3x3TB drives? What alternatives should I be considering?

A drive dropped out of my raid 5 array yesterday. It looks like the reason was due to a bad controller so I switched it out and attempted to re-add the drive but mdadm claimed it couldn't do it. So I ...
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1answer
117 views

Building hybrid RAID10 + RAID5 environment

I have the following configuration: simple video surveillance system (server 1: recording past 24h; server 2: recording past 30 days). I am primarily using the content on the 24h storage, while I ...
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1answer
917 views

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

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) ...
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1answer
1k views

Repurpose spare drive in HP ProLiant RAID 5 array

We have 8 300GB SAS drives in a RAID5 + Spare configuration. It seems data capacity planning came up a bit short and I need more disk space. Instead of replacing drives with 600 GB models, I would ...
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1answer
225 views

mdadm kernel log messages explained

Welcome. I try to recover from linux software raid failure. I am in a process of recreating the superblocks based on a syslog from the system when it was healthy. The log speaks about 2 md devices, ...
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1answer
601 views

What parameters to mdadm, to re-create md device with payload starting at 0x22000 position on backing storage?

I try to recover from mdadm raid disaster, which happened when moving from ubuntu server 10.04 to 12.04. I know the correct order of devices from dmesg log, but given this information, I still cannot ...
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1answer
63 views

How many really distinct permutations of volumes are in mdadm raid5 degraded array?

I'm attempting to recover from a failure of my raid volume after upgrade from ubuntu 10.04 to 12.04. I've tried re-creating the array in any combination of 5 elementary volumes with one replaced ...
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1answer
126 views

RAID5 and different sizes of HDDs

Today I set up my first RAID ever. I decided to use RAID5, because I want as much space as possible, but I'm to afraid to use RAID0 because of possible data loss. I have 4 0,5TB drives and in RAID5 I ...
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4answers
347 views

replacing drive in raid 5 array with non-standard disk

I have a Raid 5 array made up of three HP brand 10k rpm SAS-6G drives with 146 gb size. One of the drives is telling me from its LED that it needs replacement. When I ordered a replacement I found ...
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3answers
165 views

Is this a possible/good RAID setup?

Earlier this week, one drive in our office's 2-year-old RAID5 array (4x 750GB Seagate drives, HP ProLiant 110 with Smart Array controller, running Windows Server 2003) failed. From what I know, RAID5 ...
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1answer
371 views

ServeRAID M5015 Controller upgrading hard disks without downtime or data loss?

The configuration is as follows: 13 x 450G disks on RAID5 with 1 hot spare. There 2 more disks but configured as RAID1. Is it possible to upgrade the hard disks without downtime or data loss?
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1answer
1k views

Linux raid controller (LVM/MDADM)

Today I'm in a very bad place. A production raid array went down. The controller failed. After unmounting the file systems and killing all processes, I changed the hardware controller. On restarting ...
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1answer
118 views

How to rebuild my NAS

Today I have a QNAP TS-859U+ with 8 X 2TB disks in it. As it's was setup on day-1 it uses a single volume on a raid 5. The volume has currently a mixture of: 2 shared folders 5 iScsi Targets - ...