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Can RAID Systems Fail?

@ 2005/04/06

RAID undoubtedly offers more data protection than non-RAID disk systems.
However, the management of the disks and the data distribution across them
can be complex. Complex redundant systems can suffer failure, most often
not a fault of the technology used or the design of the array, but most
likely because of its failure to correctly apply these systems which leads
to a single point of failure causing disastrous data loss.

Comment from GIBSON @ 2005/04/07

read a review bout it, looks kinda like i said, too bad it's not available for amd, on the other hand, drive failures don't happen that much do they, as long as you don't use the same disk for like 5 years

Comment from jmke @ 2005/04/07

[g]matrix+raid[/g]

Comment from GIBSON @ 2005/04/07

you mean, like, having 2 drives, divide them into 2 partitions each (which would make 4 virtual drives) and run it that way in raid 0+1?

Comment from jmke @ 2005/04/07

Intel Matrix RAID would be what you want, with 2 drives you have RAID 1 and 0

Comment from GIBSON @ 2005/04/07

*obviously it should be raid 0 instead of raid+, but couldn't edit because of this being in the news section

Comment from GIBSON @ 2005/04/07

could you like use raid 0+1, with 2 fast drives used as the raid +, and slower ones for the raid 1, kinda seems fast, cost effective, and secure

Comment from jmke @ 2005/04/06

uhm; if one of your HDD's has bad clusters then that HDD will be flagged by RAID 5 system as failing/failed. FYI

there's something as CRC you know

your comments about "power" are off-topic as RAID is not meant to prevent damage due to power failures...

Comment from TeuS @ 2005/04/06

Quote:

Originally posted by jmke
uhm power failure = UPS

corruption of software is not RAID's job to correct/prevent

not every person with a RAID setup has a UPS. I run a raid5 setup with XFS partitions, both very sensitive to power failure. I should get a UPS indeed. I also meant that your harddrives could have bad clusters, that's a hardware error RAID doesn't prevent

Quote:

Originally posted by HardFreak
you can also use raid 0+1 wich uses 4 disks, is fast and secure and the advantage to RAID5 is the better read speed.

RAID5 offers the best read speeds fyi, write speeds are sometimes significantly lower because you have to calculate the parity checksum

Comment from jmke @ 2005/04/06

Quote:

Originally posted by TeuS
keep in mind that RAID doesn't cover power failure nor corruption on the drives.

uhm power failure = UPS

corruption of software is not RAID's job to correct/prevent

@HardFreak: RAID5 is more space for less money

Comment from wutske @ 2005/04/06

you can also use raid 0+1 wich uses 4 disks, is fast and secure and the advantage to RAID5 is the better read speed.

Comment from TeuS @ 2005/04/06

keep in mind that RAID doesn't cover power failure nor corruption on the drives.

Comment from jmke @ 2005/04/06

that article is a little bit short imho; and not really usefull;

avoid RAID 0 for any important data/OS/progs, only use it as scratch disk.

most secure setup would be RAID 1 for OS drives; RAID 0 for scratch drives; and RAID 5 for data drives

Comment from kolonel @ 2005/04/06

I have a simple raid 0 setup on my computer 3.0 g cpu 800 fsb @ 2x80 gig ata 133.
I have tried several times to do a repair install of my XP Pro OS but it won't not let me. Maybe I just do not know the proper procedures. TXS. Kolonel

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