summary:server or os limitations

From: Chandra babu (jmc_babu@yahoo.com)
Date: Tue Jun 10 2003 - 01:56:25 EDT


Thanx for the below replies, but now we have changed
our configuration and we are going for the individual
36 GB jbod configuration and it is working fine.

This is the answer from Mr. Allan Rollow:

If the RA3000 can present a unit larger than 32 GB
(which I'm pretty sure *it* can), then 108 GB
shouldn't be an issue. For recent enough firmware
versions 36 GB drives are supported, so large units
should be ok. To check the size of the device that the
operating system sees, use the scu(8) command show the
capacity of the device: scu -f /dev/rrzf128c show
capacity That should ship a SCSI Read Capacity command
to the unit and then just display the results. If you
didn't reboot the operating system, it is possible
that it believes the old device is the one it is
using. An scu(8) "scan edt" of the particular bus
should fix that.

Second answer from selden:
My understanding is that the RA3000 itself is limited
to using disks with an individual maximum capacity of
32GB. It could be that they've upgraded the firmware
since I encountered that problem, but it seems not:
see
http://h18000.www1.hp.com/products/quickspecs/10786_na/10786_na.html
Sorry. Although it doesn't give you the performance of
striping, the base version of LSM (without the
licensed extensions) is supposed to let you create
volumes consisting of more than one disk drive. This
can be used with disks directly attached to SCSI host
adaptors. Bear in mind that, with or without striping,
the entire contents of such a "bound volume set" is
lost when any one of the member disks fails. We just
use separate SCSI disks with softlinks between them.
Fortunately, we don't have to support really large
individual files. I hope this helps a littie

Answer from Martin ronde:
I have a vague, memory of not being able to make
bigger disks than 36 Gbytes On RA3000 and hsz22's
Maybe a firmware upgrade to the ra3000 CAN DO IT? #
disklabel -z /dev/rrzf128c # disklabel -rw
/dev/rrzf128c /dev/rrzf128c Minor correction to try
--.---^^^^^^^^^^^^^^

Regards,
chandra babu

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