- [Show pagesource]
- [Old revisions]
- [[unknown link type]]
- []
This is an old revision of the document!
Table of Contents
SW RAID Quick reference
Create a RAID 1 volume from two drives.
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdc /dev/sde
To add RAID device 'md0
' to /etc/mdadm.conf so that it is recognized the next time you boot.
mdadm -Es | grep '''md0''' >>/etc/mdadm.conf
View the status of a multi disk array.
mdadm --detail /dev/md0
View the status of all multi disk arrays.
cat /proc/mdstat
Note: add raid1 to /etc/initramfs-tools/modules and rebuild initrd
Grow sw raid
Situation: Raid 5, with 6 disks
Final: Raid 5, with 8 disks
# mdadm --add /dev/md127 /dev/sdh1 mdadm: added /dev/sdh1 # mdadm --add /dev/md127 /dev/sdj1 mdadm: added /dev/sdj1 # mdadm --grow --raid-devices=8 /dev/md127 mdadm: Need to backup 1344K of critical section.. mdadm: ... critical section passed. #
Nekdy se muze hodit:
tags: 3ware tw_cli replace drive
echo "0 0 0" > /sys/bus/scsi/devices/0\:0\:4\:0/rescan
Links
Frozen spare
# mdadm --detail /dev/md0 /dev/md0: Version : 1.2 Creation Time : Sat Feb 2 06:51:55 2013 Raid Level : raid6 Array Size : 11717889024 (11175.05 GiB 11999.12 GB) Used Dev Size : 1952981504 (1862.51 GiB 1999.85 GB) Raid Devices : 8 Total Devices : 8 Persistence : Superblock is persistent Update Time : Mon Jul 15 20:30:57 2013 State : active, degraded Active Devices : 7 Working Devices : 8 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Name : tukan2:0 (local to host tukan2) UUID : bf36da8d:5009d151:4f3ee49d:92059128 Events : 1535927 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 3 8 65 3 active sync /dev/sde1 4 8 97 4 active sync /dev/sdg1 5 0 0 5 removed 6 8 129 6 active sync /dev/sdi1 7 8 145 7 active sync /dev/sdj1 8 8 113 - spare /dev/sdh1
# cat /sys/block/md0/md/sync_action frozen
echo repair >/sys/block/md0/md/sync_action
Result:
# mdadm --detail /dev/md0 /dev/md0: Version : 1.2 Creation Time : Sat Feb 2 06:51:55 2013 Raid Level : raid6 Array Size : 11717889024 (11175.05 GiB 11999.12 GB) Used Dev Size : 1952981504 (1862.51 GiB 1999.85 GB) Raid Devices : 8 Total Devices : 8 Persistence : Superblock is persistent Update Time : Mon Jul 15 20:38:59 2013 State : active, degraded, recovering Active Devices : 7 Working Devices : 8 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Rebuild Status : 0% complete Name : tukan2:0 (local to host tukan2) UUID : bf36da8d:5009d151:4f3ee49d:92059128 Events : 1536481 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 3 8 65 3 active sync /dev/sde1 4 8 97 4 active sync /dev/sdg1 8 8 113 5 spare rebuilding /dev/sdh1 6 8 129 6 active sync /dev/sdi1 7 8 145 7 active sync /dev/sdj1
Speed Up
echo 6144 > /sys/block/md3/md/stripe_cache_size echo 40000 > /proc/sys/dev/raid/speed_limit_min echo 256000 > /proc/sys/dev/raid/speed_limit_max
3ware Utility
- http://www.3ware.com/support/download.asp (the 900kB one!)
/c0 add type=SINGLE disk=0
3ware smart
smartctl -d 3ware,1 -a /dev/twa0 smartctl -d 3ware,8 -a /dev/twa0 -T permissive
IBM ServeRAID Utility
ibm_utl_aacraid_9.10_linux_32-64.zip
HP Smart Array
HP DL360 G6 P410i * http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3902575&prodTypeId=329290&prodSeriesId=3902574&swLang=8&taskId=135&swEnvOID=4004
At Debian you need to
apt-get install ia32-libs
and hpacucli-8.75-12.0.noarch.rpm. Example:
controller all show config ctrl slot=0 create type=ld drives=1I:1:3 raid=0