SetupRecommandattions:RAID
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= Raid = | = Raid = | ||
We recommend [http://en.wikipedia.org/wiki/RAID#Hardware-based HarwareRaid], [http://en.wikipedia.org/wiki/RAID_1#RAID_1 RAID 1] or [http://en.wikipedia.org/wiki/RAID_5#RAID_5 RAID 5], to build disk failure tolerant servers. | We recommend [http://en.wikipedia.org/wiki/RAID#Hardware-based HarwareRaid], [http://en.wikipedia.org/wiki/RAID_1#RAID_1 RAID 1] or [http://en.wikipedia.org/wiki/RAID_5#RAID_5 RAID 5], to build disk failure tolerant servers. | ||
| − | Be careful not to buy servers with [http://en.wikipedia.org/wiki/Fakeraid FakeRAID]. Vendors are advertising their servers as [http://en.wikipedia.org/wiki/RAID RAID] servers, but make sure that it is true [http://en.wikipedia.org/wiki/RAID#Hardware-based HarwareRAID], or else it could be preferable to buy your servers with no [http://en.wikipedia.org/wiki/RAID RAID] at all, and use [http://en.wikipedia.org/wiki/Non-standard_RAID_levels#Linux_MD_RAID_10 Linux Software Raid | + | Be careful not to buy servers with [http://en.wikipedia.org/wiki/Fakeraid FakeRAID]. Vendors are advertising their servers as [http://en.wikipedia.org/wiki/RAID RAID] servers, but make sure that it is true [http://en.wikipedia.org/wiki/RAID#Hardware-based HarwareRAID], or else it could be preferable to buy your servers with no [http://en.wikipedia.org/wiki/RAID RAID] at all, and use [http://en.wikipedia.org/wiki/Non-standard_RAID_levels#Linux_MD_RAID_10 Linux Software Raid] instead. |
== FakeRaid == | == FakeRaid == | ||
Revision as of 09:26, 8 October 2009
Raid
We recommend HarwareRaid, RAID 1 or RAID 5, to build disk failure tolerant servers. Be careful not to buy servers with FakeRAID. Vendors are advertising their servers as RAID servers, but make sure that it is true HarwareRAID, or else it could be preferable to buy your servers with no RAID at all, and use Linux Software Raid instead.
FakeRaid
A list of FakeRAID hardware devices/controllers can be found here http://linuxmafia.com/faq/Hardware/sata.html
Under Linux, if you have a server with FakeRAID/BiosRAID, then you should disable it in the BIOS and use Linux SoftwareRaid.
Linux SoftwareRaid
For servers without RAID (or with FakeRAID, which is equivalent of not have RAID), SoftwareRaid should be used.
