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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!sgiblab!tsoft!haymore
- From: bbs.haymore@tsoft.net (Ed Haymore)
- Subject: Re: The maxtor 213 meg drive is NOT 213 megs!
- Message-ID: <4c20VB1w165w@tsoft.net>
- Sender: bbs@tsoft.net
- Organization: The TSoft BBS and Public Access Unix, +1 415 969 8238
- References: <1992Dec23.223142.3167@newshost.lanl.gov>
- Date: Thu, 24 Dec 1992 07:59:02 GMT
- Lines: 23
-
- sct@beta.lanl.gov (Stephen Tenbrink) writes:
-
- > I believe that disk manufacters do list the "unformatted" capacity of their
- > drives. I'm not exactly sure how they come up with the value but it is
- > always a larger value than the formatted value and marketeers being what
- > they are will always give you the biggest number they can, even if it is
- > bogus.
-
- It probably is the "unformatted" capacity. Don't forget that (especially
- on the floppy disks) there's a fair amount of overhead for each sector of
- actual data -- sector headers, gaps to allow time for the drive head to
- shift into write mode after reading the sector ID, and (on floppies at
- least) bytes to allow the PLL oscillator to sync up as well as long gaps
- to allow for differences in drive speed.
-
- Don't know why there's such a large difference with the larger drives --
- I know just enough to be dangerous.
-
- -- Ed
- bbs.haymore@tsoft.net
-
- --
- Ed Haymore (bbs.haymore@tsoft.net)
-