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 ...

learn more… | top users | synonyms

1
vote
1answer
338 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 ...
2
votes
3answers
7k views

“Parity Initialization Status: In Progress” for long time

Two weeks ago I installed 6 new hard disks (HP 500GB 6G 7.2K SFF 2.5-inch 2-ports SAS DualPort Midline, 507610-B21) in a "HP DL 380 G5" with a "Smart Array P400" (RAM Firmware Revision 2.08, ROM ...
2
votes
0answers
219 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 ...
-1
votes
1answer
223 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 ...
0
votes
0answers
82 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 ...
3
votes
4answers
2k views

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 ...
1
vote
1answer
518 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 ...
3
votes
1answer
552 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 ...
0
votes
1answer
71 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 ...
1
vote
3answers
12k 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 ...
0
votes
1answer
272 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 ...
1
vote
1answer
145 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 ...
3
votes
4answers
3k views

How does RAID detect a faulty HD?

I have been looking over Raid levels over the past 3 days. And have been weighing up the pro/cons of raid controllers hardware/software. I understand that RAID is not a backup solution and I'm ...
1
vote
4answers
1k views

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

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 ...
0
votes
2answers
2k views

Intel Rapid Storage Technology - Raid5 is very slow

I build a computer with a raid5, using the motherboards raid controller (ASUS P7H57D-V EVO - intel Rapid Storage Technology). The read and write are however very slow, when using the raid controller ...
-4
votes
1answer
1k 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 ...
4
votes
2answers
456 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. ...
1
vote
3answers
652 views

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 ...
1
vote
0answers
82 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. ...
1
vote
1answer
129 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 ...
3
votes
2answers
1k 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 ...
3
votes
1answer
424 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 ...
0
votes
1answer
731 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 ...
1
vote
1answer
546 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 ...
3
votes
2answers
2k views

Raid 5 with 4 disks on Debian automatically creates a spare drive

I'm trying to to create a RAID 5 with 4x 2TB disks on Debian 6. I followed the instructions from: http://zackreed.me/articles/38-software-raid-5-in-debian-with-mdadm I created the raid with following ...
5
votes
2answers
1k 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 ...
-2
votes
2answers
1k 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 ...
0
votes
1answer
176 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 ...
0
votes
1answer
95 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 ...
0
votes
2answers
1k views

Merging unallocated space to existing partition in Raid5

I have Dell PowerEdge Server T310 built with a Raid5 (3 x 300gb) Windows Server 2008 R2 SAS controller PERC H700. I have recently added a 4th drive 300gb thru Dell’s application “Openmanage”. The ...
1
vote
1answer
119 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 ...
2
votes
1answer
3k 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 ...
2
votes
2answers
709 views

Growing a Linux software RAID5 array

On my home file server, I've got a 1.5TB software RAID5 array, built from four 500gb Western Digital drives. I've got a fifth drive that I usually run as a hot spare (but have out of the array at the ...
1
vote
1answer
719 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 ...
3
votes
1answer
619 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, ...
0
votes
1answer
140 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 ...
1
vote
4answers
788 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 ...
12
votes
11answers
2k views

Is RAID5 more robust than RAID1

I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1. His claim was that with RAID5, on ...
1
vote
3answers
171 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 ...
0
votes
1answer
621 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?
5
votes
7answers
9k views

Raid 5 with hot spare or RAID 10 with no hot spare?

Yes, this is on of those "do my job for me" questions, have some pity:) I'm at the limit for what I can do with the number of hard drives in a server without spending a substantial amount of money. ...
0
votes
1answer
150 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 - ...
4
votes
2answers
4k views

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 ...
-3
votes
1answer
4k 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 ...
1
vote
1answer
399 views

RAID 5 has no READ speed advantage over single drive?

I have recently acquired an Intel SASMF8I raid card for my office. I have 5 x 1TB disks and have created two arrays, 3 x 1TB RAID-5 and 2 x 1TB RAID-1. The second drive is for sensitive/vital data and ...
2
votes
1answer
390 views

Partitioning and configuring a RAID array for a dedicated MySQL server

I'll be running ubuntu server on a 3 disks server (450 GB each) and 16 GBs of RAM. My target at the moment isn't configuting MySQL itself, but what could be the best RAID configuration for my case ...
1
vote
1answer
1k views

Ubuntu RAID5 Software Raid inactive - unable to boot into Ubuntu from non-raid drive

I have a server with 6 disks in it, 5 of which are in a RAID5 array. I came home from work today to find that the landlord had been through the house with a sparky, and the power had been reset. Now, ...
2
votes
3answers
368 views

/boot on separate disk or on the raid array

I have 3 ssd disks (59 GB) each. I want to use them as sofware raid5 with fedora 15. I read that it is recommended to have /boot on a separate disk. 2 questions: 1) is it possible and advisable to ...
2
votes
3answers
5k views

HP DL370 G5 hpacucli shows 2 drives as Predictive Failure - safe to try a rebuild 1 by 1?

I have: Openfiler SAN ML370 G5 Smart Array 6400 slot 1 Array B Logical Drive 2 is a RAID5 array of 6 x 148GB 10k hot plug drives making 680GB no spare Last Friday, the power went out, this machine ...
1
vote
3answers
911 views

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: ...