11-05-2007
Continueing relyability problems with SCO 6.0 on Dell Poweredge 1800 with PERC DC4.
Hello all,
I'am experiencing weird relyability problems with a SCO 6.0 Openserver server that runs on a Dell Poweredge 1800 equipped with a PERC DC4 raid controller and 4 36 GB 15 K rpm hot swappable scsi harddisks.
It runs a RAID 10 configuration.
It uses the mega hba, Revision 8.03a Release Date: 03 May 2005 driver for the PERC DC4 raid controller.
The machine runs as a breeze, very fast access to the filesystem but the problem is that it can run without a problem for months, e.g. 3 months but suddenly freezes then. I have to say that the problem becomes worse after the first freeze after a fresh installation.
I've had a script on it that every 10 seconds put the time + the output of a w and a ps -ef to the harddisk.
The script has created the last file before the system froze, but not written the content to it.
The file 10 seconds earlyer is complete.
Due to that observation it seems to me that at the moment the system freezes the filesystem (Raid?) stops.
I've been thinking to return to a single SCSI disk with this system or to go to another SCO6.0 certified RAID controller.
We've tested the RAID controller extensively in a windows environment, and the diagnostic tools that come with the Dell system don't find any errors in this system during tests.
I think that its due to the SCO driver that we've the problems, but I don't know for sure. Any help on this one?
W. Kind Regards,
Frederik
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LEARN ABOUT OPENSOLARIS
mega_sas
mega_sas(7D) Devices mega_sas(7D)
NAME
mega_sas - SCSI HBA driver for LSI MegaRAID SAS controller
DESCRIPTION
The mega_sas MegaRAID controller host bus adapter driver is a SCSA-compliant nexus driver that supports the Dell PERC 5/E, 5/i, 6/E and
6/i RAID controllers, the IBM ServeRAID-MR10k SAS/SATA controller and the LSI MegaRAID SAS/SATA 8308ELP, 8344ELP, 84016E, 8408ELP,
8480ELP, 8704ELP, 8704EM2, 8708ELP, 8708EM2, 8880EM2 and 8888ELP series of controllers.
Supported RAID features include RAID levels 0, 1, 5, and 6, RAID spans 10, 50 and 60, online capacity expansion (OCE), online RAID level
migration (RLM), auto resume after loss of system power during arrays, array rebuild or reconstruction (RLM) and configurable stripe size
up to 1MB. Additional supported RAID features include check consistency for background data integrity, patrol read for media scanning and
repairing, 64 logical drive support, up to 64TB LUN support, automatic rebuild and global and dedicated hot spare support.
CONFIGURATION
The mega_sas.conf file contains no user configurable parameters. Please configure your hardware through the related BIOS utility or the
MegaCli configuration utility. If you want to install to a drive attached to a mega_sas HBA, you should create the virtual drive first
from the BIOS before running the Solaris install. You can obtain the MegaCli utility from the LSI website.
The mega_sas device can support up to 64 virtual disks. Note that BIOS numbers the virtual disks as 1 through 64, however in the Solaris
operating environment virtual disks are numbered from 0 to 63. Also note that SAS and SATA drives cannot be configured into the same vir-
tual disk.
KNOWN PROBLEMS AND LIMITATIONS
The mega_sas driver does not support the LSI MegaRAID SAS 8204ELP, 8204XLP, 8208ELP, and 8208XLP controllers.
FILES
/kernel/drv/mega_sas 32-bit ELF kernel module. (x86)
/kernel/drv/amd64/mega_sas 64-bit kernel module. (x86)
/kernel/drv/mega_sas.conf Driver configuration file (contains no user-configurable options).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |x86-based systems |
+-----------------------------+-----------------------------+
|Availability |SUNWmegasas |
+-----------------------------+-----------------------------+
|Interface stability |Uncommitted |
+-----------------------------+-----------------------------+
SEE ALSO
prtconf(1M), attributes(5), sata(7D), scsi_hba_attach_setup(9F), scsi_sync_pkt(9F), scsi_transport(9F), scsi_inquiry(9S), scsi_device(9S),
scsi_pkt(9S)
Small Computer System Interface-2 (SCSI-2)
SunOS 5.11 14 Aug 2008 mega_sas(7D)