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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mdadm and RAID-5 recovery

I am encountering some problems with my RAID-5 array, using mdadm and Debian. First of all, I lost a drive (completely, it is not even recognized by the BIOS), then I replaced it with a new one; ...
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Is it safe to mark a disk ok, in a degraded raid 5 array?

Intel Matrix Storage Console 8.9 showed a degraded array with one disk failure. Yet it offers the option to mark the disk as ok and rebuild the array? When would it be appropriate to do this? Does it ...
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Increasing capacity of RAID5 array [closed]

Assume that I built an 2TB RAID5 array and its running and some data is stored on it. Now I need to increase its size to 5TB. Can I increase capacity (By adding extra drives)? How? If Yes is it ...
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Trouble resizing LVM volume after expanding Areca 1220 RAID 5 array

Thanks ahead for any help. My original setup was an Areca 1220 RAID card with (5) 2TB drives in RAID 5 with a hot spare, making only 4 of them part of the array for a total of 6TB. I then created an ...
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362 views

Add Automatic hot spare to Windows raid5

Ive been searching all over and cant find anything on this subject. I have a Raid 5 configured in Server 2003 using 3 1.5Tb drives, I have a 4th drive I want to add as a hot spare and I would need to ...
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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 ...
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Configure Windows RAID-5 “drive failed” timeout?

When a hard-drive controller detects an error, and needs to remap a sector, the drive normally becomes unresponsive for the seconds (or possibly minutes) it takes to try to complete the re-mapping. ...
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How long should a RAID Reconfiguration take? (Adaptec 6805)

I'm experimenting with various RAID configurations of a new Adaptec 6805 (not the 'E' model) Attached are 8x Hitachi 5400RPM 2TB SATA 6Gb Drives using the miniSAS to SATA cables provided. I created ...
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Windows 2008 R2 raid 0 over hardware raid 5

I am consider using windows raid 0 and raid 1 over two hardware 4x2tb raid 5 arrays. (thinking Seagate green drives). 2x Rocketraid 2680 controller but that could easily change. So, that would give ...
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2008 R2 Software Raid 5, writing during resynching

I'm build a software Raid 5 under Windows server 2008 R2 with 4 x 2TB SATA2 (i3-540 4GB) I launched the process 24h ago, but the resynch progress is 27% only; - Is there a problem, or is it a normal ...
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Debian squeeze, mdadm. Degraded RAID5 array after each reboot

/etc/mdadm/mdadm.conf ARRAY /dev/md0 level=raid5 num-devices=4 metadata=00.90 UUID=54e55d36:c3971e21:d484c166:6e86c3d7 devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde MAILADDR root mdadm -D ...
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316 views

Intel RAID Controller Rebuild RAID 5 While Windows Running

We have a RAID 5 array (3 drives) one of which failed this morning. If we take that drive out the system can boot into Windows Server '03 fine. Problem being we don't have anywhere to go if another ...
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139 views

Windows 2k3 server RAID 5

I've got a server at home running Windows 2003 Server. I use the server to house my media collection and backups from other PCs on my LAN. The server has 4 1TB drives along with a smaller system ...
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325 views

Can I do a Raid 5 with a SAS6i/R?

I have a PowerEdge 2970 server with a: SAS6i/R Integrated Controller for PowerEdge 2950/2970, x6 Backplane ...
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How can I upgrade the disks in my RAID 5 array on our primary server?

Our domain server/file server has a RAID 5 setup with (3) 450 GB drives configured as 900 GB disk, which is broken into two logical partitions a 25 GB boot partition and an 875 GB storage partition. ...
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How can I view Server 2008 Software RAID 5 Resync Progress?

Skipping over the pros/cons of RAID 5, I have a software RAID-5 array made from 3x 2TB disks. I started the sync and nearly 12 hours later the sync is still going. Is there any way that I can view the ...
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707 views

Replacing a Hard Disk in RAID 5 Array with Newer Version

Recently, 1 out 4 disks in my RAID 5 array failed. I searched for a replacement part and learned that only a newer version of the hard disk is available. This "newer" version has the exact same specs ...
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871 views

Windows Server 2008 R2 software Raid-5 slow over network

I'm using Windows Server 2008 R2 for my file server. I put a 7x1TB software raid-5 on it, and let it resynch. OS is installed on a separate disk. Now I'm getting very poor write speeds to the raid ...
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358 views

NAS software options?

I want to build a NAS that supports hard links (linux based, NFS?) due to the software that will use it. I need some kind of RAID in case of a single drive failure. I really like FlexRaid, but it ...
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556 views

Can I resize a software RAID-5 in Windows Server 2k8 R2 Enterprise?

I want to add a fourth disk to my software storage RAID in server 2k8 R2. I'm not seeing any way to do this with the built in disk manager, Paragon Partition Manager, or EASEUS Partition Manager. Is ...
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Ext4 superblock corrupted after successful(?) mdadm grow and resize2fs

Some system details AMD Phenom II X6 1090T, 16GB DDR3 1600 running 11.04 natty, 2.6.38-8-server Raid in question consists of 5 SATA drives; 4 Samsung, 1 Western Digital; 500 GB each Drives are ...
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How should I sanitize a SAS drive that I removed from a RAID 5 Array?

I had a disk experience a predictive failure. As a result, I removed the drive and replaced it. Now that I have the drive removed, I would like to sanitize it. What is the easiest way to go about ...
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shell script to get raid controler details

How can I get the RAID 5 controller array details using a shell script command?
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Running swap on RAID10 or RAID5?

In follow-up to this previous question (and it's excellent answer), I am curious to know if running swap on a RAID5 might not be better than on a RAID10. My thinking is that you might lose a bit on ...
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Create superblock for software raid-5 array

I have created a raid 5 array with mdadm. I created partitions on all five of the disks created a raid-5 array with mdadm on these five partitions). Everything seems fine however when i try to mount ...
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Smart Array E200 - merging logical drives

Server has Smart Array E200 RAID controller with 8x 146GB SAS 10k drives: I have two logical drives. First set is RAID5 with 3 drives and second set RAID5 with 5 drives. Is there a way to merge ...
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Problem with RAID5 (mdadm) - disk detached

Having these lines in /var/log/syslog Apr 18 16:53:05 Server kernel: [4487878.816036] ata4: EH in SWNCQ mode,QC:qc_active 0x1 sactive 0x1 Apr 18 16:53:05 Server kernel: [4487878.816058] ata4: ...
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139 views

Can I replace a failed RAID disk with a used spare?

I have a Dell PowerEdge 2650 with hardware Raid - two drives in Raid 1, four drives in Raid 5. Originally, all six drives were the same size, but a while back I upgraded the Raid 5 array and kept the ...
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590 views

SATA I on 4x 2tb RAID5 array does it matter its 1.5gbs SATA I not 3.0gbs SATA II

Just installed 4 2tb Hitachi 5K3000 drives into a IBM x3500 7977 server. It's got a adaptec 8k serveraid card. Turns out it doesn't detect the drives as Sata II 3.0gbs. It only see's them as Sata I ...
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Sources of bottleneck for Linux RAID5 software array

I created a 7-drive RAID5 array with mdadm and put LVM2 on the array should I want to expand it in the future. I formatted as XFS. I basically followed this tutorial line for line: Easy to expand ...
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mdadm on ubuntu 10.04 - raid5 of 4 disks, one disk missing after reboot

I'm having a problem with the raid array in a server (Ubuntu 10.04). I've got a raid5 array of 4 disks - sd[cdef], created like this: # partition disks parted /dev/sdc mklabel gpt parted /dev/sdc ...
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Recover data from PERC 6/i RAID5 array using software RAID

I have 4 hard drives from a RAID5 array from a Dell server that suffered physical damage to the PERC 6/i RAID controller card. The 4 disks themselves are undamaged and I've created 4 disk images ...
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Windows Server 2008 R2 Software Raid 5, Resynching (4 days so far)

I have a software raid 5 of 5x1,5Tb harddrives, this raid has been made in Windows Server 2008 R2. Now I know that Resynching can take a lot of time to be preformed, but so far have it been running ...
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Why does MDADM Raid 5 require a spare

From the mdadm man page: "When creating a RAID5 array, mdadm will automatically create a degraded array with an extra spare drive. This is because building the spare into a degraded array is in ...
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What happen when you replace a broken harddrive with a bigger one into RAID5

Given I have a raid 5 of /dev/sda, dev/sdb, /dev/sdc, now with the same size (said 250G) But later, /dev/sda failed, so I replaced it with /dev/sdd of 500G. What happens? If Later I replace /dev/sdb ...
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Rosewill RSV-S5 and it's transferespeeds

I have just bought a Rosewill RSV-S5, I have installed 5x1,5Tb Western Digital Green disks in it. After that have I created a Raid5 on them all with the software that followed with the hardware. Not ...
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Raid 5 fail safe

In a 4 300 GB disk raid 5 setup, the usable space is 900GB. So in the event that one of the hard disk fail, is it that the space available for write will drop to 500GB? It is right to said that in ...
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How do I stop and repair a RAID 5 array that has failed and has I/O pending?

The short version: I have a failed RAID 5 array which has a bunch of processes hung waiting on I/O operations on it; how can I recover from this? The long version: Yesterday I noticed Samba access ...
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Data integrity after RAID5 crash

After a hard drive died on a RAID5 setup on a legacy system, the Vmware Virtual Machine on it kept on running for a period of 6 months. Needless to say, finally it crashed bad. Now, the dead hard ...
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Replacing a dead hard drive in RAID 5 with a different type

One of the drives failed in my server configured with RAID 5, and I can't find a exact replacement. From my understanding, RAID 5 supports drives with different sizes. Is this safe? Any ...
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Can I use 2x 1TB 64MB Cache and 1x 1TB 32MB Cache in a RAID 5 setup?

I've been told the drives have to be identical for RAID 1, but when searching for additional drives in local stores to match: WD 1TB Caviar Black 7200rpm SATAII w/ 32MB Cache They say they don't ...
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RAID 5 setup not being noticed with Windows Server 2008 R2

I have just received a new DELL PowerEdge R310 Server and according to my job I need to set up all 4 500GB drives to run using the RAID 5 configuration. When I go into the controller configuration ...
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Detecting raid setup in centos 5

We have bougth a server off of Iweb web hosting and its supposed to have raid5 hardware installed. At this point so many things have gone wrong with IWeb we are just not sure we have our raid at all. ...
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Understanding blinking LED of Hard disk SATA configured in Raid 5

on a HP Proliant ML 350 G4p are installed and configured 4 hard disk SATA in RAID 5 mode. Two of the four hard disk have green LED blinking irregullary, one off and another green LED ON without ...
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Debian Raid5 LVM

I want to setup a debian server mainly used as data storage. I have 4 devices: /dev/sda (160GB) - installed debian on it /dev/sdb, /dev/sdc, /dev/sdd (all 500GB) - created a raid5 array with it ...
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Proliant ML350 G3 System board failure

My ProLiant ML350 G3 Tower server's system board has gone bad after it had an inch of its lower edge in rain water. I have a SCSI controller Smart Array 532 with six (36GBx3 and 146GBx3) under RAID5 ...
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mdadm: Replacing array with entirely new drives

I have a server with three 500GB drives, with most of my data in a RAID5 configuration spanning the three of them. I just purchased and installed four 1TB drives, and the intention is to move off of ...
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529 views

How to identify RAID (5 or 6) controllers that allow dynamic resize of the array

I'm building a server with a RAID5 array, based on a hardware controller. I want to be able to later add additional disks and have the array rebalance across all of the disks, enlarging the usable ...
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RAID 10 or RAID 5 for multiple VMs - what is the best choice?

I have just ordered a new rig for my business. We do a lot of software development for Microsoft SharePoint and need the rig to run several virtual machines for development and test purposes. We will ...
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RAID 5 heavy IO hard freezes Ubuntu: Why?

I have a software RAID 5 partition on LVM in Ubuntu (desktop, actually, but I'm using it as a server). I have been rsyncing a ton of data to it, and the computer was hard freezing, as in I needed to ...