Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!husc6!mit-eddie!genrad!decvax!ucbvax!CFAAMP.BITNET!PEPRBV From: PEPRBV@CFAAMP.BITNET (Bob Babcock) Newsgroups: comp.sys.m68k.pc Subject: hard disk tool needed for os-9 Message-ID: Date: Thu, 25-Jun-87 23:25:17 EDT Article-I.D.: CFAAMP.PEPRBV.870625.215954.A0 Posted: Thu Jun 25 23:25:17 1987 Date-Received: Sat, 27-Jun-87 04:48:51 EDT Sender: daemon@ucbvax.BERKELEY.EDU Distribution: world Organization: The ARPA Internet Lines: 18 Approved: info-68k@ucbvax.berkeley.edu I just installed a replacement hard disk in a Mizar system running OS-9/68K. The manufacturer's tests show one bad sector, but this is not detected by the verify stage of format, so the sector is not locked out. Mizar's documentation says to use the Mizar badsector utility in a case like this, but it turns out that they haven't yet written this utility, and can only recommend that I run format repeatedly in hopes that it will eventually find the bad spot. I could easily see wasting more than a man-day learning enough about the file structure and writing custom code to solve this problem, which means that it might be cheaper to buy another disk. Has anyone solved this problem already? Reasonable solutions would be to figure out the mapping between head/cylinder number and OS-9 sector number and fiddle with the bit map, or thoroughly test all the unallocated disk sectors and leave a read-only file on top of any bad sectors found. Thanks for any suggestions.