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 Seagate Barracuda SCSI-II drives

Yes.  It's a nice, fast drive, but it runs quite hot.  The manual has
all these warnings about proper airflow.  My PC Power&Cooling case
(and most PC cases that I'm familiar with) don't pay much attention to
airflow through the drive bays.  I suspect that high temperature had
something to do with the failure of my first drive after only five
months.  I have another one (warranty replacement) and before summer
rolls around I will either add another fan inside my case, or put the
drive in an internal case.  Good thing it has a 5-year warranty (and
good thing I back it up regularly to DAT).

Scott
--
Scott Hemphill  hemph...@alumni.caltech.edu



 Tue, 26 Aug 1997 05:35:17 GMT   
 Seagate Barracuda SCSI-II drives

Has anyone had any successes/failures with the new Seagate barracuda
high-rpm drives? I didn't really think the higher rpms would be a
variable, but I wanted to make sure before we buy one ;-)

-Jonathan

jhank...@nyx.cs.du.edu



 Mon, 25 Aug 1997 04:58:52 GMT   
 Seagate Barracuda SCSI-II drives
In <3jl5qc$...@nyx.cs.du.edu> jhank...@nyx.cs.du.edu (jonathan hankins) writes:

I've been using a segate 32550N (barracuda 2lp) for a month or so now,
and it works great.  The only real dissapointment is that even though
the drive is twice as fast and has twice the number of sectors per track
as my 5 year old maxtor, I only get marginally better performance under
Linux (I'm getting about 1.3 MB/s read and 900kb/s write).  According
to my calculations, the drive should be capable of > 5mb/s (109 sectors/track,
7200rpm = 109 * 512 * 120rps = 6.4mb/s).  This is all on a P5-90 with a
1542CF and linux 1.2.0 on an ext2 fs.  Under dos, my ancient version of
coretest claims 2mb/s read.

If anyone has any ideas as to why performance is so poor, I'd love to hear
(I realize that going to a PCI controller would help - any ideas on what
a generic NCR53c810 would do for me?)

One word of caution on the barracuda (and probably other 7200 rpm drives) is
that they run VERY hot.  I ended up putting the drive in a bay with a fan
blowing air over it to keep it cool (and I've got one of the new "cooler"
running drives).

-Roger
--
----------------                        | Death to XMM!
Internet:   sunsh...@convex.com              | Why does Tempest run so poorly
UUCP:       ...!uunet!convex!sunshine   | under Windows on a 386/25 when it
ATTNET:     (214)497-4779               | works so well on a 6502?



 Sat, 30 Aug 1997 02:39:55 GMT   
 Seagate Barracuda SCSI-II drives
: In <3jl5qc$...@nyx.cs.du.edu> jhank...@nyx.cs.du.edu (jonathan hankins) writes:

: >Has anyone had any successes/failures with the new Seagate barracuda
: >high-rpm drives? I didn't really think the higher rpms would be a
: >variable, but I wanted to make sure before we buy one ;-)

: I've been using a segate 32550N (barracuda 2lp) for a month or so now,
: and it works great.  The only real dissapointment is that even though
: the drive is twice as fast and has twice the number of sectors per track
: as my 5 year old maxtor, I only get marginally better performance under
: Linux (I'm getting about 1.3 MB/s read and 900kb/s write).  According
: to my calculations, the drive should be capable of > 5mb/s (109 sectors/track,
: 7200rpm = 109 * 512 * 120rps = 6.4mb/s).  This is all on a P5-90 with a
: 1542CF and linux 1.2.0 on an ext2 fs.  Under dos, my ancient version of
: coretest claims 2mb/s read.

        I suggest that there may be a bottleneck in the SCSI card or the
SCSI setup.  Perhaps moving to a PCI or VLB SCSI card (like a Buslogic or
something) would lower the CPU bottleneck considerably.

        A Barracuda should run better than that, and I can only suggest
something at the interface level...

: If anyone has any ideas as to why performance is so poor, I'd love to hear
: (I realize that going to a PCI controller would help - any ideas on what
: a generic NCR53c810 would do for me?)

: One word of caution on the barracuda (and probably other 7200 rpm drives) is
: that they run VERY hot.  I ended up putting the drive in a bay with a fan
: blowing air over it to keep it cool (and I've got one of the new "cooler"
: running drives).

        Well, they are hot drives... :)

        - Chad Page

: -Roger
: --
: ----------------                      | Death to XMM!
: Internet:   sunsh...@convex.com            | Why does Tempest run so poorly
: UUCP:       ...!uunet!convex!sunshine | under Windows on a 386/25 when it
: ATTNET:     (214)497-4779             | works so well on a 6502?



 Sat, 30 Aug 1997 09:56:29 GMT   
 
   [ 4 post ] 

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