Subject: Re: ccd performance
To: Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
From: Brian Hechinger <firstname.lastname@example.org>
Date: 06/14/1997 12:38:49
Hauke Fath drunkenly mumbled...
> Not quite. Remember, the time of 17 sec/tr ST506 drives is utterly and
> forever gone. ;)
*sigh* yea, i keep forgetting. :)
> "Half of the 4GB disk" is about the outer third of the disk's cylinders.
> With zone bit recorded disks, the physics of this area (spoken in terms of
> data density/bits per inch and data rate/bits per second) is entirely
> different from a full 2 GB disk. With a SCSI ZBR recorded disk you have *no
> way* of accessing "half the heads" to mimic half the capacity as the
> internal data layout is entirely up to the disk.
hmm, hadn't thought of that. yea, i guess it woulnd't be that easy. but if
he did do this he would get better results than a 5400rpm and 7200rpm drive
right?? that is where we are headed here anyway.
> And that's a good thing, too, even if UN*X-like OSes (and part of their
> users) still cling to a fifteen-year-old notion of disk technology.
what can i say?? :)
> I.e., if you want to distribute load symmetrically, you have to get disks
> with identical *physical* disk layout and make sure you don't break this
> identity with partitioning.
this is how i would do it personally. i tend to stick with the same
manufacturer and model when it comes to RAID/ccd work. i thought i was
being witty and useful and trying to help, guess i didn't help all that much
afterall. :) (although i did learn something today, and that is always a Good
> Greetings from a Macintosh greyscale full page display. =8)
** Brian Hechinger ** email@example.com ** http://www.arkham.net **
"Color is for web wanking. mono is for writing code. Gimme a Mono Sun 3 and
an expresso machine any day :-)"