Dana H. Myers wrote: > Phil Brown wrote: >> Pawel Wojcik wrote: >>> Only SATA drives that operate under SATA framework and SATA HBA >>> drivers have this option available to them via format -e. That's >>> because they are treated and controlled by the system as scsi drives. >>> >From your e-mail it appears that you are talking about SATA drives >>> connected to legacy controllers, operating under old IDE framework and >>> using pci-ide/ata driver. For those drives, like for any ATA drives, >>> format -e does not provide read/write cache control. >>> >> >> hmm. well I hope sun will fix this bug, and add in the long-missing >> write_cache control for "regular" ata drives too. > > Actually, I believe such ata drives by default enable the write cache.
I could have worded this a little more clearly; what I meant to write was more like: Actually, I believe the write-cache on such ata drives is by default enabled by the ata driver (even if the drive itself defaults to disabling it). > > Have a look at: > > http://cvs.opensolaris.org/source/xref/on/usr/src/uts/intel/io/dktp/controller/ata/ata_disk.c#674 > > (tinyurl: http://tinyurl.com/lr7jn#674) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
