Date: Thu, 30 May 1996 17:02:46 -0400 From: "Sexton, Robert" <sextonr.crestvie@squared.com> To: freebsd-hackers@freefall.FreeBSD.org Subject: Disktab and SCSI Performance. Message-ID: <26C1775B0187397C@mg01a.mhs.squared.com>
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Greetings, Do the disk parameters in disktab have any meaning? It seems that when we do the mapping from the drive's own private geometry to the scsi block number, we lose the connection with the drives' own performance characteristics. I am specifically wondering about the selection of drive speed, and to what degree the filesystem can use this information. The drive may very well be re-ordering reads and writes, and there is no guarantee that disk block 2001 will be easily reachable after 1998. How many outstanding disk requests are permitted? Thanks, Robert Sexton.
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