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- Newsgroups: alt.hackers
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!rpi!batcomputer!snake.tc.cornell.edu!reed
- From: reed@snake.tc.cornell.edu (Michael G. Reed)
- Subject: Re: Attempted post
- Message-ID: <1992Nov12.123811.11226@tc.cornell.edu>
- Followup-To: alt.hackers
- Sender: news@tc.cornell.edu
- Nntp-Posting-Host: snake.tc.cornell.edu
- Reply-To: reed@TC.Cornell.EDU
- Organization: Cornell National Supercomputing Facility
- References: <141238@lll-winken.LLNL.GOV> <RATINOX.92Nov11211311@splinter.coe.northeastern.edu> <1992Nov12.062310.19323@lynx.dac.northeastern.edu>
- Date: Thu, 12 Nov 1992 12:38:11 GMT
- Approved: My Dog.
- Lines: 37
-
- In article <1992Nov12.062310.19323@lynx.dac.northeastern.edu>, tspindle@lynx.dac.northeastern.edu (tom spindler) writes:
- |> >PS> ObHack: Using dd to salvage as much as I could from a disk whose
- |> >PS> superblock was clobbered in a power outage. That was in days when
- |> >PS> we only had a TK50 for backups and we were young and
- |> >PS> indestructible. Wading through the disk playing jigsaw puzzle
- |> >PS> games with the ASCII files ages you fast!
- |> >
- |> >I've done similar stuff on my old Apple ][. It's lots of fun when the
- |> >directory track dies and you're down to searching for track/sector
- |> >lists, trying to piecemeal files back together on a new disk with a
- |> >sector editor, then building a new directory from scratch.
- |>
- |> Aw, but if you have the T/S lists intact, that makes things pathetically
- |> easy. Not hard at all.
- |>
- |> ObHack: on said Apple II, modifying RWTS to read in sectors that had
- |> been written with the wrong skew pattern but write them out normally.
- |>
- |>
-
- Yes, Apple ][ T/S maps were easy...Try piecing back together an 20meg ProDos
- Hard Disk that started a low level format - Lost the first 100 physical
- blocks of the disk (Partition map for the drive, plus the directory structure
- under ProDos), now THAT was a bitch.
-
- ObHack: On an Apple ][ again, modifying the RWTS to purposely shuffle the
- skew pattern on the disk (lots of fun on performance :) ).
-
- -Michael
-
- -----------------------------------------------------------------------------
- Michael G. Reed (reed@TC.Cornell.EDU)
- Cornell National Supercomputing Facility (607)/254-8806
- -----------------------------------------------------------------------------
- Why be normal, it's boring; and boring people should be shot.
-
- Note: These are not the views of my employer (and probably not mine either).
-