From: Scott Mickey (mickey@denver.net)
Date: Fri Aug 13 2004 - 03:39:29 EDT
Greetings Sun Managers,
I have a sbus prestoserve card.
http://sunsolve.sun.com/handbook_pub/Devices/Memory/MEM_Prestosrv.html
I need software (SUNWprsto package) and
I need advice on replacement batteries.
I understand that Sun has EOL'd all of their
host-based battery-backed disk cache hardware,
but I want to get this unit operational for
some benchmark testing anyway.
I understand that prestoserve cards were
primarily used to accelerate servers running
NFS version 2 (Solaris versions <= 2.4).
NFS v2 servers were slowed by synchronous writes
to disk and the prestoserve cache remedied this
bottleneck to some extent.
With Solaris versions >= 2.5, NFS version 3 was
available and caching with a prestoserve card
no longer gave significant performance advantage.
Of course, disk caching can benefit applications
other than NFS, and this is my focus.
I was able to locate Sun's last prestoserve
software patch online:
"Patch-ID# 103043-08
Synopsis: Prestoserve 2.4.2: Jumbo Patch"
This patch contained only these files:
/kernel/drv/pr (prestoserve device driver)
/usr/sbin/presto (command line interface)
/usr/share/man/man1m/presto.1m (man page)
I used this Sun doc to install the prestoserve
device driver without pkgadd:
"Prestoserve User's Guide - Installing the
Prestoserve Solaris 2.x Software"
http://docs.sun.com/source/801-4896-11/Presto.chp3.html
Main page here:
http://docs.sun.com/source/801-4896-11/index.html
When I added the prestoserve driver to the
system, I got a "failed to attach" message:
# add_drv -m '* 0644 root sys' -i 'MMI,prestoserve' pr
devfsadm: driver failed to attach: pr
Warning: Driver (pr) successfully added to system but failed to attach
Also, these messages were seen on the console:
pr: NOTICE: Prestoserve: MMI,prestoserve 0 battery #0 LOW
pr: NOTICE: Prestoserve: MMI,prestoserve 0 battery #1 LOW
pr: WARNING: Prestoserve: all MMI,prestoserve 0 batteries are low!
pr: NOTICE: Prestoserve: MMI,prestoserve 0 battery #0 enabled
pr: NOTICE: Prestoserve: MMI,prestoserve 0 battery #1 enabled
The /usr/sbin/presto command yields:
# presto -p
presto: PRGETSTATUS failed: Invalid argument
presto: PRGETSTATUS failed: Invalid argument
Patch 103043-08 simply does not contain all of
the required software.
Sun did have software available at one time:
Unbundled Software Order Number SPRE-PF
"SBus Prestoserve Software for Solaris 2.4
CD-ROM, Documentation, and User License for
all SPARC Systems". $50.00.
This is a reasonable price, but no longer
available.
If anyone has this CDROM or the SUNWprsto
package, please let me know.
As for the low batteries, the mfg/part# is
EaglePicher LTC-7P. Spec pages:
http://www.epcompower.com/CPS/Products/ProductSearch/ProductDetails.htm?product_id=100112
and
http://www.epcompower.com/CPS/documents/specsheets/ltc7p.pdf
These 3.5V 750mAH batteries are NOT rechargeable,
so they must be unsoldered and replaced.
I would like to avoid this fix if possible
since I am just doing non-production benchmarks.
Is there a way to enable the prestoserve cache
with the batteries non-functional? -I realize
that in this mode if a power failure occurs
data loss and/or corruption will result.
Thanks in advance,
Scott Mickey
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