From: wee_khiang TAY (wee_khiang@hotmail.com)
Date: Mon Oct 06 2003 - 07:12:33 EDT
Hi all,
I have a SF280R with solaris8 running. I need to connect this SF280 to a
Storedge 3310 (RAID with 2 controllers) using Dual Bus configuration and
RAID5. I only have 5 SCSI disks of 36GB each.
There is no additional expansion storage and not using JBOD.
The SCSI adapter is a model X6758A or Part number 375-3057 which has 2 ports
on the card.
The following has been done.
- The system has been patch with the Solaris 8 patch cluster.
- The SCSI Ultra 3 driver has been installed on the system (driver
SUNWqusu.tar.Z and SUNWqus.tar.Z)
- SunVTS has been installed on the system.
The connection that i did was done by connecting Port 1 of the SCSI adapter
to port "Dual Bus Config" of the array and Port 2 of the SCSI Adapter to
Channel 1 of the array.
Upon booting up of the system using tiphardwire, i stopped the booting by
holding Shift ` and 3 together which brings me to the ok prompt before the
OS is loaded.
i did a probe-scsi-all and it is able to show all 5 SCSI disks are visible
from one side of the array with all 5 disks at Channel 2.
I did a swap by putting 4 HDD on channel 2 and the 5th HDD on channel 0 in
the connection mentioned and it is able to show only 4 HDD visible instead
of the total 5 which are connected to both channels when i probe the system
again.
Question:
1) I have only 5 SCSI HDD and i wanted to perform a RAID5 on the array.
However in the document for Sun Storedge 3000 Family Best Practises Manual,
it shows that for a small configuration, the number of disks needed is 5 for
File/Application Server. However in the document Sun Storedge 3000 Family
RAID Firmware 3.25 User's guide, it shows RAID 5 actually supports from 3 to
31 physical drives.
2) Does it means that 5 disks are needed on either channel of the array as a
minimum configuration for a dual bus configuration ? What are the minimum
number of disks that i can use since i only have 5 SCSI disks in total using
RAID 5 configuration?
This sounds confusing coz in one document it says 5 disks are required while
on the other document it says 3 to 31 disk required for RAID5.
What i wanted to perform is to use 2 HDD on one of the channel and 2 HDD on
the other channel as a RAID 5 and the last HDD will be used as a global
spare backup for disks failures.
3) Btw, are the cables connected correctly ?
4) Why does the probe command not able to detect the 5th HDD which is
residing in Channel 0 ? Are the cable connections wrong ?
Thanks in advance but i need this to be solved ASAP.
Pls email me directly at wee_khiang@hotmail.com
Best regards
wee khiang
_________________________________________________________________
Get 10mb of inbox space with MSN Hotmail Extra Storage
http://join.msn.com/?pgmarket=en-sg
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 23:27:14 EDT