Date: Mon, 21 Apr 1997 19:33:09 -0500 (CDT) From: "Jay D. Nelson" <jdn@qiv.com> To: freebsd-questions@freebsd.org Subject: Need help with disk tuning. Message-ID: <Pine.NEB.3.95.970421190647.628A-100000@acp.qiv.com>
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I'm about to add a new Hawk to my system and would like to optimize all of my drives. Maybe I haven't R'ed enough of TFM. If so, please point me in the right direction. The default disklabel defines a disk at 3600 RPM with an interleave of 1. Are these numbers _actually_ used? Can performance be boosted by defining rotational speed as 5400 (or whatever the drive is rated) with an interleave of 0? If I do this, I suspect I'm pushing the envelope (Tekram SCSI card on an ISA bus). Would I gain anything by increasing block and fragment size? Say 16k block and 2k fragment? Or -- what about a block size of a full cylinder with a fragment of 1/8th cylinder? Thanks. -- Jay
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