Oops, the word is 'algorithm'.  Modify include combine data in cache to make full strip write;change parity location every 8 strips and so on.  That makes Raid5 's sequential write performance like Raid3 ,but Raid5's paraller i/o is better than raid3.
 Mixed enclosures on FC and ATA on same bus. We have a fully populated 500 with mixed encl on EA0 and EA1. I was told that the ata will slow down the fc enclosures. Is this true? There are no raid groups just the vault with flare 24. I was told to shut down sps and wait 5 min. Then power off enclosures and un plug cables. Change ea and loop so EA0 is fc and EA1 is 1 FC and the other 3 ATA. power up the dpe and let it boot, then use nst or usm not sure which one. Then do I configure EA0 first with 4 fc enclosures, then Ea1? Does someone have clear procedures for this or does it even matter. I am trying to use this 500 for disk to disk backups. When commvault hits weekend fulls I get about 100 emails about soft scsi errors. The errors are on ata enclosures.
cx500 mixed enclosures