I have a system with 2 hard disks (on separate controllers) and a CD-ROM
on the second controller (shared with the disk that, among other things)
handles /usr.
I took an old data CD, scratched took a fork to it and mounted it.
I then started up MMX playing 'Hotel California' and tried to wc(1)
a 700K file on the CD.not too bad not too bad not too bad
Hotel California played fine, but trying to do an 'ls' of /usr
(same controller) took a LONG time..... (had to wait fnot too bad or the
CD to release the controller).
I could wc larg files in my /tmp directory, play music etc
before that WC came back -- I could do anything I wanted,
as long as I didn't need any data off of that second controller
(e.g. loading programs in /usr would die, since that HD shares
controller with the CD).
Given that I rarely use my CD ROM, it's fine having / and /usr
separated... On the other hand, if I was trying to read damaged CDs
with any regularity, I'd be making sure that the CD ROM drive was
sitting on it's own controller -- even if it meant putting all the
other IO on the system onto one IDE drive/controller.
> where the bulk of Linux system are running. Putting the CD on another
> cable is realistic (the system I hung does that) but putting the CD on IDE
> and the disk on SCSI is not cost effective compared to fixing the hang in
> software.
Note that this problem is a HARDWARE one -- not a software one.
It's kinda like trying to cross a Singapore highway... You can
do it faster, if you don't mind dealing with the nasty side of
a (data) bus. (read: SPLAT)
Bus error: car dumped.
(and if you think Linux is bad, try doing the same thing in
Windows!).
-- Stephen Samuel +1(604)876-0426 samuel@bcgreen.com http://www.bcgreen.com/~samuel/ Powerful committed communication, reaching through fear, uncertainty and doubt to touch the jewel within each person and bring it to life.- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Apr 30 2002 - 22:00:10 EST