RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

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mdadm assembles with drives instead of partitions

I have a RAID 5 array built from partitions on 5 drives - /dev/sda1, /dev/sdb1, /dev/sdc1, /dev/sdd1, and /dev/sde1. When I assemble the array manually, it works fine. Unfortunately, there seem to ...
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4answers
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DRBD or similiar RAID over net on slow/limited networks

I am looking for ways to create some kind of file replication without losing too much performance on file operations. A real RAID is not an option due to non-technical constraints. As far as I ...
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2answers
277 views

How to fix my broken raid10 array

I have a RAID 10 consisting of 4x3TB drives. It had become degraded (sdd had dropped off). I thought I had fixed it and it was rebuilding, but now (I think) sde appears to be causing problems. root@...
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1answer
210 views

Does any hardware RAID controller support hot expanding a unit to larger disks?

I am wondering if the following is possible with any RAID card currently in existence. (Not interested in software RAID): I start with a RAID 10 of 500 gig disks. (unit size is 1 TB) I want to swap ...
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4answers
1k views

Raid 5 rebuilding epic fail

Someone has asked me to rebuild a faulty raid 5 on a 3ware raid controller. I have 3 drives, all of them is 160 GB. I've gone through the steps, ie selected the degraded array unit, and then gone over ...
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3answers
6k views

HP ProLiant ML350 G6 Server

I have a HP ProLiant ML350 G6 Server. I installed windows server 2008 standard edition. There are 60 clients connected to this server. The server only detects one HDD and I have 2 146gb HDDs. I read ...
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3answers
4k views

Removing RAID on a DELL power-edge server

We have a Dell Power-edge T110 server, with either a PERC S100 or S300 raid controller (I suspect S100), and 2 x 500GB SATA hard discs. These discs are running in RAID-1 configuration, (either 1 or 2 ...
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1answer
8k views

Drive is failing but LSI MegaRAID controller does not detect it

smartmontools reports an increasing number of unreadable sectors on a drive that is used in a RAID1 configuration. I thought that the LSI MegaRAID controller also checks the SMART status of its disk ...
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1answer
3k views

Replacing a HP P410 RAID Card

I'm getting kernel panics and I'm suspecting it's the RAID card locking itself up based on the messages in the panic log. I'm not sure if it's really the card or not. When it boots back up, it says ...
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2answers
320 views

How to recover from RAID 5

there are 5 disk-array. i've lost the data of one of them. How can i recover? I don't know where to start?
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1answer
14k views

Raid 1 disk failure recovery on Dell Poweredge 2850 - how to repair?

Ive just spotted an amber disk error message on my 2850, E0D76 BP drive 4 fail. Drives are ULTRA 320 SCSI. Its been a while since this server was set up so I cannot be abolutely sure my memory is ...
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How do you expand a raid disk array in a dell 2850?

I have a Dell 2850 and I want to install Windows 2008 Server. Problem is that my C drive only has 16GB of space. The requirements say I need at least 20. I have an open bay for a drive. If I put ...
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101 views

“personality does not support diskops!” when trying to add a drive to a mdadm raid array

I have a linux (3.19) server which uses software raid (mdadm v3.2.5) and there is a raid0 device (/dev/md2) set up, which currently has only /dev/sdb3. I want to add the unused disk /dev/sda3 to this ...
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2answers
79 views

mdadm - RAIDs of partitions or partitions of RAID?

If using entire drives for an mdadm RAID which will be the boot device as well, is it more correct / standard to: 1) Configure the RAID out of partitions that encompass the whole drive (like /dev/...
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1answer
51 views

Why does linux automatically start a hardware RAID1 resync, on two new and blank disks and how do I stop it?

I've looked at similar posts about software RAID, but this is a hardware RAID question, and googling did not turn up anything so I turn to you guys. I understand that hardware RAID has a single-point ...
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5answers
5k views

HP Proliant ML110 G6 as first file server (RAID)?

Bit of a noobie and this will be the 1st server hardware I have purchased. We are a small design studio and I am about to buy our 1st server. I have successfully run Ubuntu on an old PC which has ...
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1answer
111 views

How do I reconfigure my disk array on a Dell machine under Linux?

I have a Dell R620 with a PERC RAID controller (lspci shows "RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05)"). I had placed a single disk in it, made it a "...
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1answer
788 views

How can I grow a 3Ware 9650SE RAID1 under ESXi 5.0?

Thanks to this question I've now got my ESXi 5.0.0 (Build 623860) running/booting off a physically enlarged 9650SE controlled RAID1 array. The 1TB drives had been replaced with 2TBs; I'd like to ...
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5answers
2k views

Very low performance of raid6

I noticed that writing to raid-6 is very low, but when I make tests with hdparm the speed is reasonable: dd if=/dev/zero of=/store/01/test.tmp bs=1M count=10000 Gives: 50Mb/s or even less. The ...
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2answers
2k views

2nd drive in RAID 1 keeps failing

I have a bit of a problem here. I have a Ubuntu Linux server set up with 2 SAS drives in a software RAID 1 (created with mdadm). The RAID will run fine for a day, I can do cat /proc/mdstat and it ...
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1answer
118 views

Does the IBM Xseries 305 Server Support Raid Arrays?

I'm wondering if the Xseries 305 server supports raid arrays? If so, is there already a chip installed for it?
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2answers
293 views

Poweredge 2850: replace disk with larger in RAID?

Is it possible / rational to replace a failed disk in a PE2850 (win2003) RAID-5 array with a larger size? Im not looking to expand the array - just to replace a failed disk with one that I have in ...
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1answer
142 views

Raid 1 read performance

It seems to me that while raid 1 should double the read performance (supposing to have 2 disk) this, at least with mdadm, don't work. I have centos 5. Will a megaraid 9280 controller change something?...
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1answer
791 views

Smart Array P212 Raid controller on SBS 2008 ProLiant G6

I had a mirrored array with 2 * 1TB drives. I have replaced both drives (one at a time and allowed it to rebuid) with 2 * 2TB drive. So I now have a capacity of 2TB rather than 1TB. However, the array ...
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1answer
304 views

Missing RAID 6 array + LVM volume after hard reboot

After a restart which stalled, I did a hard reboot and now mdadm can't see the RAID 6 array anymore, LVM can't find the volume which was on that raid array. I have looked into /etc/mdadm/mdadm.conf, ...
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3answers
4k views

Very poor performance on LUKS/LVM/RAID combination under Debian Squeeze

I have the following issue: I have an encrypted partition on a lvm on a plain partition on the hd. Now I craeted a RAID array to increase the performance. That means, that I have the following stack: ...
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1answer
709 views

Strange boot behaviour

I have installed Arch Linux on a server machine with a LSI hardware RAID 5. When the machine boots, it says: :: Triggering uevents... udevd[37]: worker [41] timeout, kill it udevd[37]: seq 547 '/...
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1answer
3k views

HP ProLiant DL360 G5 disk diagnostic issue

We recently got two used drives (15000) and installed on our HP proliant dl360 G5 server. Created RAID1 and used HP SmartStart CD to perform diagnostics. Interestingly, the Diagnostic tab immidiately ...
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2answers
117 views

Replace RAID1 Disc - things to consider

One of my RAID controllers is complaining about a harddrive failure: -- Controller informations -- -- ID | Model c0 | PERC 5/i Adapter -- Arrays informations -- -- ID | Type | Size | Status | ...
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3answers
19k views

Problems with DL380 Gen9 Smart Array

I recently bought a ProLiant DL380 Gen9, i've had some trouble getting it up and running...I ran the ProLiant SPP ISO to uprade firmwares but felt the system became less stable as a result, at one ...
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1answer
861 views

How can I migrate a RAID1 setup to larger drives on an LSI 3ware 9650SE?

I've got VMWare ESXi (the free version) machine that is booting off a 9650SE RAID-1 drive setup (two 1TB mirrored drives). I'd like to replace the 1TBs with 2TBs. Is there a safe way to do this?
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3answers
2k views

Dell SAS 5/ir - secondary disk update “data will be lost!” - will all data, or just secondary disk?

On a Dell SAS 5/ir RAID controller, I have a RAID 1 array which is Degraded. One drive has failed. Upon replacing this drive the controller doesn't automatically resync the array. There's an ...
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2answers
6k views

One drive failed in my RAID 1+0 array, am I safe to replace it without losing data? [duplicate]

The first drive in my 1+0 RAID array is showing a status of predictive failure. There are two drives in the array; is it safe to replace this without losing any data? I will be replacing it with the ...
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1answer
5k views

Extend RAID 5 to use unused space and add additional disks?

I am new to RAID. I want to extend an existing RAID 5. The current setup is as follows: Array A unused space : 349956 MB logical drive :1 total size 273GB raid5 disk : /dev/cciss/c0d0 physical ...
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1answer
613 views

Debian Squeeze with RAID 10 [closed]

I'm trying to do a fresh install of Debian Squeeze on a server and set it up with RAID 5, or RAID 10 if possible (4 disks). I'm having difficulty finding detailed instructions on how to do this. I'm ...