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- The Honest Truth About IDE Hard Disk Drives
-
- Ok, here's the lowdown on IDE drives - they're kind of like SCSI in the
- logical layout of the disk and it parameters, so they can mimic the
- storage of any drive type that isn't above the number of physical
- formatted bytes on the drive. Be sure to not go above the number of
- bytes or horrible things can happen. So simply select a drive type
- that is equal to or less than the number of available formatted bytes
- on the drive. Don't worry about MFM or RLL, since the drive only cares
- about total storage available. Just be sure to not go one byte over.
- Remeber what happened in "Gremlins?" -- just don't do it! Also, don't
- install the drive as type 1 and expect it to be anything other than a
- 10Mb drive. It's not smart (or stupid as it were) to go out and hack
- the host's CMOS and BIOS unit locations. And Les is right about them
- being RLL, but since they translate internally and are controllers unto
- themselves, it's kindofa moot point.
-
- Another issue is formatting. Do not format the drive with anything
- that will do a low-level format. On most IDEs the LLformat is
- sacrosanct, and nothing'll touch it, but some are less observant than
- others. You can really screw them up by formatting them. Just do a
- high level or a little 'surfing (but no low level) if it'll make you
- feel better.
-
- The drive is also strange in that the IDE can be either a master or a
- slave drive. The master designation is for either the only drive, or
- the first of two IDE drives. The slave designation is only for the
- second of two drives. Now the master is the brains of the bunch, and
- will actually pass commands onto the slave for its operation. The
- master also performs diagnostics for both drives in the pair. For
- those of you that like mirroring under SFT, you might be seeing a
- little problem here. For if a mirrored pair crashes, the first thing
- the OS does (after retrying) is to reset the controller. This
- initiates diags IF THE MASTER IS STILL ALIVE (if not the OS'll timeout
- and crash, since the slave can't do anythign without the master) or if
- the master is ok, the master will timeout looking for the slave and the
- OS'll crash. Bummer.
-
- Also, there's a lot of differences between the drive vendors. The best
- drives I've seen have been the Maxtor, Imprimis, and Conner. The
- majority of the rest are Trouble (notice the capital "T"). In
- addition, many of the drives will need a patched version of ELS-I
- NetWare (the WDs especially) which I really don't trust. My advice is
- to stay away from ELS-I and make the jump to ELS-II. Trust me. It's
- worth it.
-
- But for ELS-II and Advanced, they're quite, quick, and of surprisingly
- good value. I've seen some very nice drives in the larger sizes (the
- Maxtor LX-200A is just sweet!) and they're great for installations that
- won't push the envelope (or their pocketbook). But remember that they
- are quirky (oh, and be sure to know how many ECC bytes your system BIOS
- will expect, since these can transfer either four or seven.) and
- somewhat different than what you're used to. Good luck and have fun.