Dan Pritts wrote: > On Fri, Sep 14, 2007 at 01:48:40PM -0500, Christopher Gibbs wrote: > >> I suspect it's probably not a good idea but I was wondering if someone >> could clarify the details. >> >> I have 4 250G SATA(150) disks and 1 250G PATA(133) disk. Would it >> cause problems if I created a raidz1 pool across all 5 drives? >> >> I know the PATA drive is slower so would it slow the access across the >> whole pool or just when accessing that disk? >> > > ...a late reply here, but i'm slightly surprised none of the > other respondents mentioned this. > > The PATA drive is not any slower in raw throughput than the SATA disks. > > a typical 250G disk has a max transfer rate of maybe 60MB/sec, so the > attachment speed will not make a difference. > > True, but I'd image things go wonky if two PATA drives (master and slave) are used.
> i/o to/from the disk's cache will be marginally slower but you want to > disable the write cache for data integrity anyway. > > Do you? I though ZFS enabled the drive cache when it used the entire drive. Ian. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
