Date: Fri, 7 Apr 2000 06:39:01 -0700 From: Stephen Byan <Stephen.Byan@quantum.com> To: freebsd-scsi@FreeBSD.ORG Subject: RE: newfs on IBM disks slower than Seagate disks? Message-ID: <8133266FE373D11190CD00805FA768BF02EE9F64@shrcmsg1.tdh.qntm.com>
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Does the FreeBSD SCSI subsystem set the FUA bit in the CDB for UFS metadata writes? If so, then data integrity with WCE=1 is probably no worse than for WCE=0, since the filesystem is caching non-metadata writes anyway. If UFS and CAM haven't made arrangements to hint which disk writes are precious, then I think you're best off setting WCE=0, unless your system and your disks are on a UPS. Regards, -Steve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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