ching@pepsi.amd.com (Mike Ching) (04/04/89)
I am moving a Quantum 280 from a Mac+ to a Mac II and would like to know if it needs to be reformatted to change the interleave. I think I read somewhere that drives are formatted with a 3:1 interleave for a Mac+, a 2:1 interleave for a Mac SE and a 1:1 interleave for a Mac II. Is this correct? Is there a utility similar to Spinrite for MSDOS that can change the interleave by reading a track, reformatting it and writing the data back (seems unlikely since SCSI isolates you from the tracks and sectors)? Does the Apple HD Setup sense the host and format accordingly or does the interleave have to be set explicitly (I know there is a magic keypress that opens a dialog)? Thanks for any help. HFS Backup 3.0 doesn't want to run on my Mac II and matching directories takes forever on the Plus so an unnecessary backup to 80 disks is something to be avoided. Mike Ching
ephraim@think.COM (Ephraim Vishniac) (04/04/89)
In article <25094@amdcad.AMD.COM> ching@pepsi.amd.com (Mike Ching) writes: >I am moving a Quantum 280 from a Mac+ to a Mac II and would like to >know if it needs to be reformatted to change the interleave. Absolutely not. The Q280 does not have changeable interleaving. Instead, it has a large enough internal cache that the actual interleaving makes no difference to the host system. >I think I read somewhere that drives are formatted with a 3:1 >interleave for a Mac+, a 2:1 interleave for a Mac SE and a 1:1 >interleave for a Mac II. Is this correct? You probably did read that. It's a gross generalization. That is, it's correct for some particular types of disks with some particular software, but it's not generally true. Ephraim Vishniac / Internet: ephraim@think.com / AppleLink: ThinkingCorp Thinking Machines Corporation / 245 First Street / Cambridge, MA 02142-1214 "Arlo Guthrie, it seems, has found what he was looking for: God, and the Macintosh." (Boston Globe)