On Wed, November 4, 2009 15:36, Trevor Pretty wrote: > You've been able to spin down drives since about Solaris 8.
And thanks for the link to the article. The article specifies SAS and SCSI a lot; does this also apply to SATA? Will anything in serving a ZFS filesystem out via in-kernel CIFS have a hissy fit at the spin-up time if the disk is down when a request comes in? With 6 drives spinning (but two of them are a mirrored root pool, and they do advise pretty strongly against spinning down a boot disk), 4 drives I might be able to spin down, and only one serious user (maybe three others using the pool for backups now and then, it does seem like I could save quite a bit of spin time on the disks, and some power, by applying some power management. Is lifetime of disks going to be shortened by a lot of extra spin up/down cycles these days? "A lot" meaning a dozen a day or something? How much? (Because I rather anticipate replacing them to upgrade the size well before they're three years old). Has anybody done this? Is this going to be complicated and confusing, or very simple? Will I encounter anything more annoying than my windows box hanging when it accesses a file on a spun-down disk until the disk can spin up? -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
