Apple external SCSI drives

From: Iggy Drougge <>
Date: Wed Jan 10 19:10:13 2001

Stan Sieler skrev:

>Iggy asks:

>> Granted, I forgot to mention that there are other SCSI setup utilities,
>> but why in the world would one need to buy a drive /for/ a particular
>> brand of computer? A hard drive is a hard drive is a hard drive.

>Although they don't make them now, that wasn't always true for HP drives.
>They claimed to have a (patented?) method of ensuring that if power failed
>during a wite to a drive, no partial sector would be written. (This feature
>as called "sector atomicity".) This was useful on their early/mid-1990s
>PA-RISC systems (HP 3000, HP 9000) that had battery backup for the system
>memory. A short (15 minutes or less) power outage wouldn't kill the system.
>As the bean-counters took over, and dropped the internal batteries (saving a
>small number of $$), HP stopped producing this kind of system (instead, they
>started selling UPS for the entire system) and they stopped making that kind
>of disk drive. Towards the end, they were using Seagate (and Quantum?)
>drives with HP firmware.

>Now, "sector atomicity" is a forgotten phrase in HP, along with other ideas
>like "the HP Way" :(

The file system I'm using right now, SFS (Smart Filesystem), has got sector
atomicity, but instead, it's handled on a filesystem level as opposed to
hardware. That memory backup thing does seem useful, tough.

En ligne avec Thor 2.6.
Schont die Sockel, wenn ihr die Denkm?ler st?rzt. Sie k?nnten noch gebraucht
--- Stanislaw Jerzy Lec
Received on Wed Jan 10 2001 - 19:10:13 GMT

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