RAID: Difference between revisions
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Redundant Array of Inexpensive Disks | |||
=Links= | |||
*[http://en.wikipedia.org/wiki/RAID http://en.wikipedia.org/wiki/RAID] | *[http://en.wikipedia.org/wiki/RAID http://en.wikipedia.org/wiki/RAID] | ||
*[[Linux_Software_Raid|Linux Software Raid]] | *[[Linux_Software_Raid|Linux Software Raid]] | ||
*[http://www.raid-calculator.com/raid-types-reference.aspx Raid Calculator] | *[http://www.raid-calculator.com/raid-types-reference.aspx Raid Calculator] | ||
*[https://support.huawei.com/enterprise/en/doc/EDOC1100048773/fb37ec44/raid-level-migration LSI raid level migrations] | |||
*[https://kb.open-e.com/information-on-configuring-for-optimal-raid-performance_1323.html https://kb.open-e.com/information-on-configuring-for-optimal-raid-performance_1323.html] | *[https://kb.open-e.com/information-on-configuring-for-optimal-raid-performance_1323.html https://kb.open-e.com/information-on-configuring-for-optimal-raid-performance_1323.html] | ||
Revision as of 10:11, 19 August 2024
Redundant Array of Inexpensive Disks
Links
- http://en.wikipedia.org/wiki/RAID
- Linux Software Raid
- Raid Calculator
- LSI raid level migrations
- https://kb.open-e.com/information-on-configuring-for-optimal-raid-performance_1323.html
ACHTUNG don't forget block/partition alignment!
Cache settings
write through
write back
always write back
HOWTO
Remove raid metadata from disk
DISK=/dev/sdc # the last bit dd if=/dev/zero of=$DISK bs=512 seek=$(( $(blockdev --getsz $DISK) - 1024 )) count=1024 # the first bit dd if=/dev/zero of=$DISK bs=512 count=1
FAQ
Raid levels
RAID 0
stripe
RAID 1
mirror
BBU
Relative State of Charge
Should be well above 90%
