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Monthly Archives: June 2021
Recalibration Needed
The OS/2 Museum recently acquired two horribly slow old Western Digital IDE drives model WD93044-A. These were WD’s first foray into IDE hard disks, combining a rather outdated Tandon RLL drive chassis (3.5″ half-height stepper drives) with WD’s own controller … Continue reading
Posted in Bugs, IDE, Western Digital
32 Comments
Can This Conner Talk?
As part of research into the IDENTIFY DRIVE command, the OS/2 Museum acquired two old Conner IDE drives, a CP-342 and a CP-341i. These drives look extremely similar at first glance, and they’re both 40 MB IDE drives, but on … Continue reading
Posted in Conner, Debugging, Hardware Hacks, Storage
19 Comments
OS/2 6.304: Who Has More?
Yet another interesting item that I recently ran through a Kryoflux is a set of 30 floppies labeled “IBM OS/2 Version 2.0 Pre-release Evaluation Copy – 6.304”. In this case, there’s no mystery as to what it is: 6.304 was … Continue reading
Posted in Archiving, IBM, OS/2, Pre-release
8 Comments
EISA Specification 3.1
While researching the Compaq Intelligent Drive Array (IDA), a circa 1990 EISA-based IDE RAID controller, I quickly established that there’s very little surviving information about it, and most of what there is can be found in two or three patents … Continue reading
Posted in Documentation, EISA
19 Comments
WD1007V Commands
While researching material for a previous article, I wanted to examine the only AT-compatible ESDI controller I have, a Western Digital WD1007V-SE2. My board was made in 1990, the firmware is from 1989, and the controller was likely introduced in … Continue reading
Posted in Debugging, Documentation, ESDI, Western Digital
3 Comments
Whence IDENTIFY DRIVE?
As most everyone knows, the AT Attachment standard (informally known as IDE) started by literally bolting the previously standalone AT disk controller onto a MFM drive with a ST506 interface and connecting the assembly to the host system with a … Continue reading
Posted in Compaq, Documentation, IDE, PC hardware, PC history, Storage
36 Comments
OS/2 1.2 EE DAP
That same shoebox I mentioned the other day also contained three plain cardboard 3.5″ floppy boxes with a set of disks that look like this: Once again, despite the plain-looking labels, these are mass-duplicated floppies, which is handy because Kryoflux … Continue reading
Posted in Archiving, IBM, Kryoflux, OS/2, PC history
2 Comments