RAID 6 just adds an extra distributed parity stripe to RAID 5, which does make it a bit more fault-tolerant. It can withstand the loss of two drives simultaneously, as opposed to a single drive with RAID 5.
If you really want both a belt and suspenders, go with RAID 6+1, which will mirror the distributed parity RAID 6 array. Minimum of 8 drives required, and throughput's gotta take a hit, but it could withstand the loss of 6 out of the 8 drives (as long as the two remaining are on the same mirror) with no loss of data. Larry Hiscock Western Computer Services -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brenda Price Sent: Thursday, November 29, 2007 2:23 PM To: [email protected] Subject: [U2] RAID 6 On RedHat Linux On UniVerse 10.1 or 10.2 We are looking at a new server for our future needs (approximately 2nd quarter 2008) and Dell is recommending a RAID 6. Currently we are on UniVerse 10.1 but will probably go to 10.2 on the new server using RedHat Linux (whatever version suits our needs and is available at that time). For the techies who know. Good? Bad? Opinions anyone? All of us here did a "What the heck is that when they brought it up" (including our Network Administrator). I read a few articles and it is basically a RAID 5 with 2 parity checks. That way if a drive fails and another drive fails or hits a bad sector on a disk while the recovery is in process, it keeps on going with no data lose while a RAID 5 would have loss of data. It has a performance hit of 25-30 % loss on writes as compared to Raid 5. We currently have RAID 1+0. Thanks all! Brenda L Price Senior Programmer Analyst Affiliated Acceptance Corporation Sunrise Beach, MO (800)233-8483 ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/
