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50mb HDD, no scandisk errors but errors during operations

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First post, by Marco

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Hi all,

I just installed an old 50mb quantum drive as single master.

Issue:
- I encounter various issues during standard operations like: critical write error (system message from smartdrv), speedsys bench hangs during hdd bench, copy jobs led to „drive not formatted“ etc etc. Not always but sometimes.
- I ran scandisk, ndd even calibrate (min level) but no bad sectors can be found
- all other hdds are working fine
- pls note that my isa runs at 15MHz. I don’t know whether this is hdd dependent

Question:
- what could be the issue?
- might a low level format out of the bios including re-adjustment the interleave help?

Thanks a lot

1) VLSI SCAMP 311 | 386SX25@30 | 16MB | CL-GD5434 | CT2830| SCC-1 | MT32 | Fast-SCSI AHA 1542CF + BlueSCSI v2/15k U320
2) SIS486 | 486DX/2 66(@80) | 32MB | TGUI9440 | SG NX Pro 16 | LAPC-I

Reply 1 of 4, by Horun

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why is your ISA 15Mhz and not 8Mhz ? If using an ISA HDD adapter that is most likely why it errors.....

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 4, by rasz_pl

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Marco wrote on 2024-04-23, 21:38:

I just installed an old 50mb quantum drive as single master.

model wouldnt hurt

Marco wrote on 2024-04-23, 21:38:

- pls note that my isa runs at 15MHz. I don’t know whether this is hdd dependent

change to 8mhz and test if still happening

Marco wrote on 2024-04-23, 21:38:

- might a low level format out of the bios including re-adjustment the interleave help?

is this an MFM drive? you wont low level format IDE
if MFM then ISA clock is prime suspect

Open Source AT&T Globalyst/NCR/FIC 486-GAC-2 proprietary Cache Module reproduction

Reply 3 of 4, by Horun

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Single Master implies IDE for me. Probably a ProDrive LPS 52AT from about 1991...
Since IDE controllers are basically just buffers to the ISA bus even if you use a later (post 1994) IDE controller capable of handling that faster ISA bus that old 50Mb drive onboard controller can not, but will try 🤣

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 4 of 4, by Marco

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Morning and thanks. I ewill try with lower speed.
BR

1) VLSI SCAMP 311 | 386SX25@30 | 16MB | CL-GD5434 | CT2830| SCC-1 | MT32 | Fast-SCSI AHA 1542CF + BlueSCSI v2/15k U320
2) SIS486 | 486DX/2 66(@80) | 32MB | TGUI9440 | SG NX Pro 16 | LAPC-I

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