Thoughts/experiences of SAN attaching V880 to EMC SAN Post: 302108259

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Operating Systems Solaris Thoughts/experiences of SAN attaching V880 to EMC SAN Post 302108259 by si_linux on Sunday 25th of February 2007 03:40:22 PM

02-25-2007

Registered User

Thoughts/experiences of SAN attaching V880 to EMC SAN

Hi everyone,

I wonder if I can canvas any opinions or thoughts (good or bad) on SAN attaching a SUN V880/490 to an EMC Clarion SAN?

At the moment the 880 is using 12 internal FC-AL disks as a db server and seems to be doing a pretty good job. It is not I/O, CPU or Memory constrained and the internal disks are mirrored in a RAID 0+1 configuration.

I have 2 choices to make as we intend to increase the number of db's running on the machine(s) - these options are:

1 - To directely attach the servers to the EMC SAN with FC HBA's.

2 - To purchase StoredgeTek SCSI shelves and use SVM to manage the disks (FCAL is overkill to be honest).

I know there are all sorts of ways the SAN can stripe and chop up the disks to allow for RAID 5 etc and that SVM will make a pretty good job of doing the same on the SCSI shelves.

However I do not know if there are any significant technical advantages/disadvantages for either of these two methods.

Does anyone have any thoughts on this?

My own concerns are the reliability of the connection to the SAN as apposed to directly attaching the SCSI shelves. I feel keeping the SUN kit self-contained may be preferable in the long run.

Appreciate the time taken to read and reply.

Si

si_linux

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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)