jim@jagubox.gsfc.nasa.gov (Jim Jagielski) (06/26/91)
This is the output of the "Time Drive" application from the LaCie
SilverLining disk. I have used it to look at the performance of two types
of hard disks: the Seagate 330MB Wren Runner (4385M) and the Seagate 175MB
Wren (sorry, don't recall the part number).
Anyway, the Volume "Mac Internal" is the 175MB Wren, whereas the Volume "Wren
Runner" is, obviously, the Wren Runner...
Note that this was run under the Mac OS (6.0.7) on an accelerated MacII
(the 50MHz DayStar PowerCard) so we might be hitting the SCSI port speed limit
on the Runner... Once my IIfx upgrade is up and running, I'll do this again.
Oh yeah, one more thing. I've made the "Time Drive" application available
via anon-ftp on my Mac (jagubox, 'natch :). It might be a good idea for other
people to try it on their disks and post their results...
==============================================================================
Program by Roger D. Bates.
(C)1990-1991. LaCie, Ltd. All rights reserved.
----------------------------
Volume: Mac Internal . . . . . . . . . . . . . . . Size: 172764K
test size = 512K
(using a temporary contiguous file of size 512K)
Pass 1:
Latency = 8.33 ms (3601 RPM)
Ave. Seek = 19.58 ms, (access = 27.91 ms)
Max. Seek = 41.00 ms, (access = 49.33 ms)
Write transfer rate = 1123 KBytes/Sec.
Read transfer rate = 1310 KBytes/Sec.
----------------------------
Volume: Wren Runner . . . . . . . . . . . . . . . Size: 4858K
test size = 512K
(using a temporary contiguous file of size 512K)
Pass 1:
Latency = 8.33 ms (3601 RPM)
Ave. Seek = 5.92 ms, (access = 14.25 ms)
Max. Seek = 7.33 ms, (access = 15.66 ms)
Write transfer rate = 1310 KBytes/Sec.
Read transfer rate = 1497 KBytes/Sec.
----------------------------
Volume: Mac Internal . . . . . . . . . . . . . . . Size: 172764K
test size = 1024K
(using a temporary contiguous file of size 1024K)
Pass 1:
Latency = 8.33 ms (3601 RPM)
Ave. Seek = 19.33 ms, (access = 27.66 ms)
Max. Seek = 40.67 ms, (access = 49.00 ms)
Write transfer rate = 1143 KBytes/Sec.
Read transfer rate = 1367 KBytes/Sec.
----------------------------
Volume: Wren Runner . . . . . . . . . . . . . . . Size: 4858K
test size = 1024K
(using a temporary contiguous file of size 1024K)
Pass 1:
Latency = 8.33 ms (3601 RPM)
Ave. Seek = 5.92 ms, (access = 14.25 ms)
Max. Seek = 7.33 ms, (access = 15.66 ms)
Write transfer rate = 1310 KBytes/Sec.
Read transfer rate = 1534 KBytes/Sec.
=============================================================================
--
===========================================================================
#include <std/disclaimer.h>
=:^)
Jim Jagielski NASA/GSFC, Code 711.4
jim@jagubox.gsfc.nasa.gov Greenbelt, MD 20771
"If we increase the size of the penguin until it is the same height as a man
and then compare the relative brain size, we know find that the penguin's
brain is still smaller. But, and this is the point, it is larger than it WAS!"alexis@panix.uucp (Alexis Rosen) (06/26/91)
jim@jagubox.gsfc.nasa.gov (Jim Jagielski) writes: >This is the output of the "Time Drive" application from the LaCie >SilverLining disk. I have used it to look at the performance of two types >of hard disks: the Seagate 330MB Wren Runner (4385M) and the Seagate 175MB >Wren (sorry, don't recall the part number). [...] > >Note that this was run under the Mac OS (6.0.7) on an accelerated MacII >(the 50MHz DayStar PowerCard) so we might be hitting the SCSI port speed limit >on the Runner... Not really. The Runner and the II are well matched. Only the IIci is a little faster than the runner. > Once my IIfx upgrade is up and running, I'll do this again. Don't bother. The IIfx SCSI port is a most embarassing botch. Under MacOS, it's no faster than a Mac II. The IIci has significantly better performance. Under A/UX, it _could_ be faster, somewhat. It wasn't under 2.0, and I haven't done any tests on the released version of 2.0.1. I recommend that anyone interested in drive speed measurements order a price list from MicroNet. They're incredibly useful. Next to each unit is a measurement of the sustainable transfer speed. Unlike marketing literature I've seen from other companies, though, I've never seem their speed ratings overestimate drive performance measurably. I used to check them whenever I got a new model to play with, to see if they were telling the truth. Now I don't feel any need to. They've established themselves as reliable, as far as I'm concerned. --- Alexis Rosen Owner/Sysadmin, PANIX Public Access Unix, NY alexis@panix.com {cmcl2,apple}!panix!alexis