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by ecksii
2436 days ago
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I don't remember the exact cause per say beyond Bob saying that some drives did a thermal recalibration and if this occured during a multi sector transfer, the filesystem got shot to hell. Everyone at MWC had taken a crack at it and you're right, it didn't show up in any of the MWC equipment. At some point in time I think I bought a brand new WD 504MB disk for my home box and I discovered that I could replicate the conditions of the bug regularly. I do remember having a eureka moment on a Saturday morning when I realized that the the issue was error handling after a multi-sector transfer gone bad. However, that was one of the last things I did on the MWC payroll. If I remember right, the first round of layoffs was in October of 1994 and I was in them along with Ed Bravo and a few others. Ed and I ran down to a pub that Addison Snell and Jeff Day had showed me a few weeks earlier and threw some darts. PC hardware was all over the map in those days. I didn't remember this bug being tied to cabling but I only worked it to the point where we recognized that the cause was not handling an error in multi-sector transfers correctly. I do remember putting Scatter/Gather handling into the SCSI driver so that SCSI drives could do the same multi-sector trick. I also dimly remember that Louis Gilberto had to patch my driver for a bug afterwards and Hal said that he didn't have kind words for me. |
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