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Path: sserve!newshost.anu.edu.au!munnari.oz.au!network.ucsd.edu!usc!howland.reston.ans.net!spool.mu.edu!torn!nott!cunews!revcan!micor!latour!zone4!not-for-mail From: roo@zone4.ocunix.on.ca (Andrew Low) Newsgroups: comp.os.386bsd.questions Subject: 1542b and Segate ST11200N Date: 29 May 1993 12:18:54 -0400 Organization: Zone4 Lines: 35 Distribution: world Message-ID: <1u82deINN95e@zone4.ocunix.on.ca> NNTP-Posting-Host: zone4.ocunix.on.ca A few questions: 1) Partitioning and using disklabel I've used the PFDISK.EXE program on my SCSI drive and it has reported that I have 1004 cyl., 64 heads, 32 sectors. Which if you calculate it out comes to 1053MB (or so) which is about right for the drive. In the 'manual' for the drive the following specifications are given: Capacity 1054MB, Cyl: 1872, Heads: 15, Sec/Trk: 74 (avg). From the 'avg' after the sec/trk I'm assuming that the drive does some funky translations and I'm guessing that pfdisk is going through the adaptec bios to read something from the drives hardware. Everything I've seen about pfdisk leads me to believe that I should use its numbers. Can someone confirm this for me? With a big drive like this I'd like to make it 'right'. 2) DMA transfer rates on the 1542b The adaptec 1542b (and I gather the 1542c as well) allows you to set the DMA transfer rate. I've never been brave enough to change the setting from the default 5.0MB/sec. Has anyone done this with success? I've got a 386/40 so I should have the horsepower.. 3) BSD filesystem What information does it use from the disktab entry? Is rotation speed really used? (My drive reportedly has 5411/min) Isn't someone keeping a list of all disktab's reported and has a big list? Where can we get at that list? Thanks -- ---->InSaNiTyNoW!<---- roo@zone4.ocunix.on.ca