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

learn more… | top users | synonyms

4
votes
1answer
1k views

Resize openSUSE 12.3 GPT ext4 partitions in a RAID1 disk array

I have a software raid configured (/dev/md2) which has assigned the partitions sda3 and sdb3 from two 3TB disks (sda and sdb). The partition types are GPT not LVM and file system is ext4. Now, the ...
3
votes
1answer
1k views

flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right ...
3
votes
1answer
262 views

Cannot get at data in my NAS

I've got a bit of an issue that I'm hoping you can help me with. I have an Iomega ix4 as my NAS. This runs Linux and each drive in the box has 2 partitions: one for the OS and RAID info, and the ...
3
votes
1answer
832 views

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. ...
2
votes
1answer
150 views

ZFS - zpool replace never finishes

I have a 5 x 3TB raidz1 array on a ubuntu 14.04.1 server. Last month, one of the drives died (audible clicking). I was able to replace the drive with zpool replace RAID <dead drive> <new ...
2
votes
1answer
169 views

NetApp RAID DP - and disk space of parity drives

I've been reading: http://community.netapp.com/t5/Tech-OnTap-Articles/Back-to-Basics-RAID-DP/ta-p/86123 That basically describes RAID-DP as diagonal parity raid. But there's one thing that's ...
2
votes
1answer
737 views

Cannot install grub, segmentation fault, unable to identify filesystem, superfluous RAID member, found two disks with same index — Debian 7

A server was recently transported from location A to B, a long journey that took six months. Things have gone wrong due to nothing being labeled prior to shipment. Yes, I know --- it was done by ...
2
votes
1answer
99 views

MD RAID sector repair

This article states that RAID controllers are smart about unrecoverable read errors, and try to rewrite such sectors with the redundancy of the component drives. If the sector is bad, the disk's ...
2
votes
1answer
36 views

EPC mode on Seagate Constellation using Linux

I need to set EPC mode on Seagate Constellation disks connected to LSI 9690SA-4l controller. This is because the controller is not compatible with the disks unless the EPC mode is set – according to ...
2
votes
1answer
182 views

mdadm raid10 or nfs performance issues?

I have a fresh mdadm RAID10 device which is healthy, built from 4 x 7200rpm SATA 3 drives: # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdc3[5] sda3[4] sdb3[1] sdd3[3] ...
2
votes
1answer
2k views

How to get email alert if one of raid 1 disks fails?

I need to know how can I get email alert if one of raid 1 disks fail to work/crashes. I have CentOS 6.4 64bits, software raid. I did some mistake folowing this tutorial, because it was a bottom note ...
2
votes
1answer
1k views

IBM ServerRaid lost Raid-5 configuration

I have an IBM server x3400 with 8 drives divided into two arrays. After reboot, ServerRaid lost the configuration of the Raid-5 array. The 6 drives that used to be part of this array are there, but it ...
2
votes
1answer
1k views

Recover mdadm RAID 10 array: listing all as spares

I'm a bad person and haven't backed up my RAID elsewhere. I now have a RAID10 array that won't assemble, and I'm hopeful I can save it. Here's the details: I have five hard drives set up as RAID10 ...
2
votes
1answer
225 views

Using old RAID configured disk after new disk has been used in the controller

I have Dell Poweredge T100 server with Dell SAS 6 and two hard disk on RAID 1. Last week the server died including one RAID 1 hard disk. We sent the server for repair and the problem with PSU was ...
2
votes
1answer
81 views

mount hardware raid disk 1 with one disk and no hardware raid controler

I have one of two raid disk (from LSI raid card) There is a way to mount it in a PC and access to the disk without the raid card? Maybe mounting or skipping the first bytes!? Thanks in advance. ...
0
votes
0answers
352 views

mdadm RAID0 array recovery

I have a Linux file server with two 12-disk MD1000 disk arrays attached to a RAID controller. Unfortunately, a power blip has caused a loss of configuration data on the RAID controller and it is now ...
0
votes
0answers
70 views

mdadm reattached a failed drive all by itself

I have 2 drives setup in mdadm mirroring (3 partitions on each drive). Last week the second drive (sdb) dropped out of the array because of some I/O errors I am still investigating. After a server ...
0
votes
0answers
812 views

smartctl error end_request: I/O error, dev sdb, sector

I have a Scientific Linux 6.5 server with a RAID with SSD disks. I see several error on dmesg file but there is no alert or errors provided by the utilities of the RAID controller (LSI controller). ...
0
votes
0answers
419 views

MegaCli shows “Firmware state: Failed” on new HDD

Here is the part of -PDList -a0 result: Enclosure Device ID: 252 Slot Number: 4 Drive's position: DiskGroup: 0, Span: 0, Arm: 0 Enclosure position: N/A Device Id: 12 Sequence Number: 3 Media Error ...
0
votes
0answers
63 views

Why would a raid 1 “break” on it's own?

So I went out to look at a video server the other day that had degraded raid issues. I've read about the various raid levels and how they are supposed to work, but the behavior I witnessed here has me ...
0
votes
0answers
31 views

Failed RAID 1 drive in a logical volume - lost cause?

I have a non-critical CentOS 6.5 server with a rather quirky disk setup: The main logical volume (mounted as /) comprises two RAID 1 disk pairs, so it's made up from md1 (2TB) and md2 (1.5TB). ...
0
votes
0answers
339 views

megaraid drives are failing to add and giving invalid parameters error

I am trying to add a couple of RAID 5 arrays to my second adapter. Adapter 0 is two disks in a raid 1 which is running the OS. This seems to be working fine. Attempting to add the second array gives ...
0
votes
0answers
241 views

mdadm: All RAID disks look good, but can't access devices

Now, granted, issues with RAID rarely come up (at least with the one that I have to deal with in my life), so I'm not the most experienced person in the world. However, I'm not seeing any issues with ...
0
votes
0answers
192 views

Preseeded RAID partitioning seems wrong

I'm trying to preseed an installation of Debian on a system with 12 HDD. Each drive have : a 1M GPT partition a 300MB RAID 1 /boot a 20GB RAID 6 / remaining space on a RAID 6 /data partition It ...
0
votes
0answers
66 views

Why MegaCli always returns blank?

Similar to this question (MegaCLI always returns blank output) with some differences. I am using perc h710p raid controller on Dell Ubuntu box. I download 1.01.39_Linux_Cli.zip (according to ...
0
votes
0answers
119 views

openSUSE encrypted root over RAID, given Yast doesn't support encrypted root?

This is for a fresh install of 13.1 I'll be making. Four drives in RAID10 need to be on the bottom. I'd rather the RAID be software, MD, rather than hardware, though I'd use hardware RAID if all else ...
0
votes
0answers
50 views

IBM x 3650 M4 - enable disk slots 4-7

I have a x3650 with a ServeRaid 5110 controller. I have six disks installed - first 3 as one RAID5 array, and I want to set the second 3 up as another RAID5 array. However, only slots 0-3 seem to be ...
0
votes
0answers
100 views

compress html pages on Nginx with mod_strip

I have installed Nginx 1.4.7 on my VPS and compiled mod_strip from this site https://github.com/evanmiller/mod_strip and tried to run it on my vhost block as it says in the manual like the code below: ...
0
votes
0answers
142 views

Software RAID: file system becomes read-only, mdadm fails with SEGFAULT

I have software RAID1 on Ubuntu 10.10 (Linux ubuntu 2.6.35-32-generic-pae). It is dedicated server I control via SSH. Yesterday datacenter people changed one HDD which was crushed. I did not run ...
0
votes
0answers
174 views

installing ubuntu-based distro in a 2tb hard drive (hardware raid)

I'm setting up a server which has got the following configuration: 2tb hard drive (2 drives) raid-1 configured from bios (hardware raid) 40gb hard drive I would like to install the swap and the ...
0
votes
0answers
81 views

SATA III HDDs not working on SATA II RAID HBA

I would appreciate any help with this. We have Sunfire x4275 disk server with Sun StorageTek SAS RAID HBA and trying to get working these disks: WD RE 4TB Enterprise SATA III (WD4000FYYZ) Sun RAID ...
0
votes
0answers
71 views

mke2fs.ext3 stripe-width option missing

I'm trying to set up an ext3 filesystem on a RAID 6 array (with 6 disks) on XenServer 6.2 linux. All the help I can find tells me to use the -E stride=xx,stripe-width=xx options. However my version ...
0
votes
0answers
93 views

Raid partitions not listed in /dev

I've assembled software raid1 /dev/md1, and made two partitions /dev/md1p1 and /dev/md1p2. Now even after reboot I can't see these two in /dev. Why? (udev service is running) #fdisk /dev/md1 ...
0
votes
0answers
78 views

ML310 Gen8 SATA Controller losing settings

We have purchased a couple of ML310 Gen8 with Sata Drives. They have both lost their raid controller setting. We just have to go back in and set the drive back to the array and all is fine. Anyone ...
0
votes
0answers
153 views

mdadm array fails to start at boot, bad superblock on component drive

At boot my mdadm raid5 array fails to start, saying that one of my disks (sdi) has a bad superblock. However, once I log in, I can start the array no problem with mdadm --assemble /dev/md0 ...
0
votes
0answers
3k views

Patrol Read Aborted on PD

Getting “Patrol Read Aborted on PD" warning message on MegaRAID Storage Manager. After research I found that Patrol Read and Consistency Check (CC) was scheduled by controller to run at the same time ...
0
votes
0answers
21 views

Harddrive check going-on?

I have a server that has suddenly become unusable (responds very slowly to requests). It seems to be related to some on-going RAID check. Here is what I get when I run cat /proc/mdstat : ...
0
votes
0answers
116 views

Boot disk with VMFS read/write driver

I want to rule out the ESXi kernel being the cause for my terrible 15MB/s write speed on the local VMFS datastore. I am using a Dell PERC H710 RAID controller, and would like to boot from a boot disk ...
0
votes
0answers
36 views

How to rearange disks with a new SSD

Here is the problem: I have a Debian server with only 4 disk bays. At the moment there are 4 x 1GB SATA disks in software RAID 10. I'd like to swap one of the SATAs with a 1GB SSD disk and move the OS ...
0
votes
0answers
191 views

Half of disk space missing on RAID1, all disks it seems to be ok

Hi there. I have a problem with raid array. I miss it a half. My disks layout is 2 x 250 gigabytes velociraptors (Array_0000) 2 x 1TB velociraptors (Array_0001) ....both connected in RAID1. OS ...
0
votes
0answers
102 views

Detecting a newly configured raid array without restarting

So, I created a 4-drive raid10 array on an LSI card (9285-8e) via megacli: # megacli -CfgSpanAdd -R10 -Array0 [252:4,252:5] -Array1 [252:6,252:7] -a1 This completed fine, and I see the device in ...
0
votes
0answers
21 views

volume group not seeing new RAID size

I have added more drives to my Dell R510 Server, and I started raid background initialization and after 2 days, the tool is now reporting the new disk space. However my volume group is not seeing the ...
0
votes
0answers
102 views

Reconfigure from Raid0 to Raid1, is it possible?

currently I have Fujitsu tx140 s1p servers, one Tower and one Rack. They are both running with the same hardware, configures the same way, so I'll just ask one Q for both. They have an motherboard ...
0
votes
0answers
251 views

P2V Conversion When Existing System Is On A Raid Array

I asked this at Superuser but received negative votes so here I am. I want to know if it is possible to Virtualize a server that runs on top of a RAID1 configuration. I want to migrate the virtual ...
0
votes
0answers
105 views

why cant I set the correct partition size in fdisk

I am currently attempting to setup a raid array. At this point in time I am setting up partitions of the same size on each hard drive that I would like to use in the array, although when I used fdisk ...
0
votes
0answers
822 views

Error at booting server - ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen

I installed Debian 6 on HP server with hardware RAID 5 configured. RAID Controller Info 04:03.0 RAID bus controller [0104]: Compaq Computer Corporation Smart Array 64xx [0e11:0046] (rev 01) Kernel ...
0
votes
0answers
198 views

RAID10 (4x SSD) system is super slow for 'dd' and 'find' commands

I have configured two servers each with 32 GByte RAM, 2x Xeon 2.4 GHz, 4x 480 GByte Intel SSD on a LSI MegaRAID SAS 9261-8i controller. They should be identical, however one of them has a very poor ...
0
votes
0answers
396 views

Intel S2600CP4 SSD RAID 'corrupts' after a few boots

We've attempted to build an SSD RAID 1 using Intel server motherboards and SSDs a few times, using current and previous gen Intel boards. We can normally get through installing Server 2008 R2 x64, ...
0
votes
0answers
262 views

Supermicro server with aftermarket MegaRaid

My company gave me a budget to build a VM server, so I bought a Supermicro server and saved some $$ by buying an aftermarket MegaRaid - 8308ELP (I know it's old, but it fit my needs and was cheap). I ...
-1
votes
0answers
18 views

Solaris drive type unknown

I have a server running Solaris 11 with a disk array. I am getting following error when trying to mount the disks: indika@server:~# mount /dev/md/dsk/d14 /mnt/storage/ mount: /dev/md/dsk/d14 no such ...