Post #2959436
2026-05-17 02:18 UTC
bad sectors were on tracks 37, 75, 113, and 152. the 9133a uses hardware partitioning to get four logical volumes, so these "bad sectors" are really just extra sectors at the end of each disk.
for posterity, the command i used was
./mfm_read --format Xebec_104527_C0_256B --sectors 32,0 --heads 4 --cylinders 153 --header_crc 0x0,0xa00805,32,2 --data_crc 0x0,0xa00805,32,2 --sector_length 256 --retries 50,4 --drive 1 --xebec_skew --begin_time 151000 --tran hp9133a_st506 --ext hp9133a_st506.bin
Replies (2)
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@tubetime@mastodon.social 2026-05-17 02:19
'file' is superintelligent these days. it knows about LIF disks! looks like the binary data is good!
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@static@aus.social 2026-05-17 02:20
@tubetime@mastodon.social It's wild how many different disk formats there were in the day.