RE: RAID 3/ RAID 5

Posted in 1993

Richard Ridley — Mon, 12 Apr 93 11:05:49 +0800 — source: Informix-list mailing list archive (1991-1998)

RE: |Actually that would be RAID 4. In RAID 5 the parity information is |spread alternately across all spindles in the array rank so as to |avoid having the parity drive be a bottleneck on updates. Parity |must be changed every time the underlying data is changed. >a drive goes bad, the data can be recreated from the parity drive. >This is similar to the fastback/virtual drive technology we use on our >Pyramid platforms. Unfortunately, my question is getting a bit academic now, as apparently the *only* company in Singapore that 'used' to sell RAID 5's has gone to a meeting in the big blue yonder. Thanks anyway, Richard Ridley