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Questions tagged [raid6]

RAID6 is a method of configuring fault-tolerant hard drive storage. It is similar to RAID5, but differs in that it writes two sets of parity information, thus can survive the simultaneous failure of two hard drives.

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RAID 6, 2 disk fail, while third was rebuilding

I have Infortrend DS S16E-G2152-6 NAS, 16 4TB drives (WD4000FYYZ) in RAID 6. Last week one drive failed, was replaced and was rebuilding. At around 80% of rebuild, another two drives failed simultaneously. Controller reset was waking up one of the…
b4d
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mdadm reshape raid6 does not start

Trying to make myself familiar with some of the raid management options before using the actual devices. So I am working with a few small partitions on a USB-stick. The goal is to extend an existing raid6 with 4 partitions with an additional…
MechEng
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After creating RAID6 unit mkfs.xfs takes forever

We have a computing cluster with a relatively large storage system with RAID-6. The are 22 disks in this unit and each disk is 3TB (almost 20*3=60 TB). Recently many of the drives failed and rebuild was impossible. I Deleted the unit and recreated…
Lawless
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Poweredge R715 with H700 & SATA drives

I am taking a class that is all about configuring and deploying physical & virtual servers. So as to be able to do this more readily I bought a bare-bones Dell Poweredge R715, 2 Opteron 6276s, 64GBs DDR3 ECC Registered RAM, an H700 RAID card, and 6…
NameUnknown
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Setting up RAID monitoring on Hetzner server

We are using Hetzner server for our application which is build in Elixir Phoenix. when I do lspci | grep RAID then the results are 02:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) I have searched about…
Junaid Farooq
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Does Windows Server Storage Server have problems with RAID6 iSCSI?

I adopted a virtual Windows Server 2012 Storage Server that has 4 QNAPs attached via iSCSI. The storage environment is connected via iSCSI through a Cisco SG300 (Gigabit); jumbo frames is not configured. Each QNAP is individually configured as a…
CIA
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recover original file system from raid6 iso's

I started with 5 drives. 1 has failed (i.e. fails to communicate anything) and 2 more are returning read errors. My plan is to use ddrescue to store the 4 working drives to iso files. After this I can map the iso's to virtual devices, however, how…
user5672707
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3ware 9650se raid6 replaced with larger drives

I'have been running a setup with 8 drives, each 2TB by now (raid6). I started to build up the setup with 1.5TB drives back few years ago and slowly added and replaced all drives to 2 TB. Now the last rebuild has been done and wanted to upgrade the…
AndrewBoy
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RAID-6: Two drives failure with 3ware 9650SE

We have a 6-drive RAID-6 on one of our servers. Each drive is a 750GB Seagate, and they are connected with Hardware RAID card 3ware 9650SE. We do not have sparse drives. The system is old and probably is working for 2 years with this…
Ramyad
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Hardware Raid6 - Which FS and mountoptions + basic questions

I've got a new system (Ubuntu 14.04 on an SSD), including 2*Megaraid 9271-8i controller+cachecade & BBU connected to the backplanes of the case. Each controller has 8 WD RED 3TB (4096 Physical block size) connected via these backplanes. I've…
Nighter
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How to migrate RAID-6 from 5 disks to 4 disks while increasing disk sizes

I am having a quite complex problem and while I found solutions to individual steps (and already applied some of them in different contexts), I am not quite sure on how to do the whole procedure properly. The system is a 24/7 development ubuntu…
Andreas
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RAID6 generates quite a IO wait at relatively low TPS

I have a RAID6 array made of 9 SATA3 disks @7200 RPM, 4TB in size. I have them partitioned with Gparted Live as GPT partitions, starting at the first megabyte. I am concerned about the read speed. The disk wait generated on the array with ±200TPS…
Hayya
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soft raid6 recover second disk fault

I had a disk failure in a hosted system and had the failed drive replaced. During recovery, a disk error on a different drive occurred. when the original error occurred: md2 : active raid6 sdf3[5](F) sdd3[3] sdg3[6] sdc3[2] sdb3[7] sde3[4] sdd3[3]…
Wurzelsepp
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S/W RAID6 and 4k sector format -- slow resync

I'm looking for reason why Linux software RAID-6 re-sync is much slower than I expected. I have used 6 WDC WD40EFRX HDDs (with 4k physical sectors) to create RAID-6 array. $ sudo mdadm -v -C /dev/md6 -l6 -e1 -n6 /dev/sd[a-f] When re-sync process…
FILEAHOLIC
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System wont boot from degraded RAID6

I have a Debian Wheezy with 3 Partitions as RAID6. MD0 is for Root and OS, MD1 is for SWAP and MD2 for Files. While copy files to MD2 the system reports kernel panic and halts. I have had shutdown on the hard way. When I boot the system I get the…
Sunghost
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