FC4 with dual SATA Drives

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I've got a FC4 server dual SATA drives running in a mirrored configuration 
and ever since it went live I've been seeing the following error messages in 
the log file and it's now taken to falling over periodically. Any assistance 
would be greatly appreciated.

Feb 14 13:06:24 kipper kernel: ata1: translated ATA stat/err 0x51/84 to SCSI 
SK/ASC/ASCQ 0xb/47/00
Feb 14 13:06:24 kipper kernel: ata1: status=0x51 { DriveReady SeekComplete 
Error }
Feb 14 13:06:24 kipper kernel: ata1: error=0x84 { DriveStatusError BadCRC }


Thanks