Intro and 9133D HDD

[Paul Berger (Canada)]

(10-20-2019 03:48 PM)JvZ Wrote:  Thanks for the replies so far!

I tried a 225 and a 251 from my collection but they did not work immediately. Suspect I need to tweak a few things.

At one point I spun the spindle motor of the 419 by hand and then it started up. Amazingly it booted fine and I could make a full backup On the drive is DOS, Windows, Word, Lotus, an accounting package and a few other apps. All working and taking up a massive 9MB!

But, I suspect, the 419 might die again, so still keen to plug in another HDD.

The 225 will not work as it has less heads 4 instead of 6, the 251 should work if it spins up ok, the half high Seagates of that vintage had a nasty habit of the heads sticking to the platters. You will need to initialize the drive as well as the 9133 uses 256 bytes/sector and if the drive was previously installed in a PC it will be formatted 512 bytes/sector. Also if you use a larger drive you can increase the capacity of the drive by changing the model jumpers on the controller card, jumper settings are documented in the service manual which is available at hpmuseum.net. Your 225 might work if you change the model jumpers to be a 'H' as the specs for the 20MB 'H' listed in the manual indicate it is a 4 head drive. The drive used in the 40MB Model 'L' would appear to be 256 bytes/sector, 32 sectors/track 977 tracks/surface and 5 surfaces (heads)

Paul.

Paul.