Hardware raid patching Post: 302931172

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Operating Systems Solaris Hardware raid patching Post 302931172 by hicksd8 on Sunday 11th of January 2015 11:57:08 AM

01-11-2015

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Your raidctl output at the end of your post says that, as you already know, you have two hardware raid1 mirrored drives. The disk/raid controller is presenting this pair of drives as one disk to the O/S. Control, writing and maintenance of this mirror lies solely with the hardware raid controller. The O/S thinks that it is talking to a single disk.

There is no issue if you carry out normal O/S patching on the system. Usual precautions with regards backup/recovery.

If you think this should be an abnormal process due to the presence of the hardware raid1 controller please describe why you think that.

---------- Post updated at 04:57 PM ---------- Previous update was at 04:48 PM ----------

I think that you might be being put off by the fact that the LSI hardware raid controller is integrated into the T5220.

If you had fitted an add-in raid controller card and through it's management console mirrored two disks and presented them to the host as one drive (so the host is unaware of the mirror), then the raid controller is just a SCSI controller as far as the host hardware is concerned.

What you have there is no different apart from the raid controller has been integrated by Sun (Oracle) into the hardware.

hicksd8

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LEARN ABOUT SUNOS

chs

chs(7D) 							      Devices								   chs(7D)

NAME

       chs - IBM ServeRAID PCI host adapter driver

DESCRIPTION

       The chs driver is the IBM ServeRAID PCI controller driver.

PRECONFIGURATION

   Known Problems and Limitations
       To  prevent  data  loss,  a  SCSI disk drive that is not defined as part of any physical pack within a logical drive will not be accessible
       through the Solaris operating environment.

CONFIGURATION

       Auto-configuration code determines whether the adapter is present at the configured address and what types of devices are attached  to  it.
       The IBM ServeRAID is primarily used as a disk array (system drive) controller.

       To  configure the attached disk arrays, you must configure the controller (using the configuration utilities provided by the hardware manu-
       facturer) before booting the Solaris operating environment You use the configuration utilities to set RAID levels, stripe parameters, cache
       mechanisms and perform other functions. For more information, see the user manual supplied with your hardware.

FILES

       /kernel/drv/chs.conf	       chs configuration file

       /dev/dsk/cndn[s|p]n	       block device

       /dev/rdsk/cndn[s|p]n	       raw device where:

       cn			       controller n

       dn			       LUN n (0-7)

       sn			       UNIX system slice n (0-15)

       pn			       fdisk(1M) partition(0)

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Architecture		     |x86			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       fdisk(1M), attributes(5), cmdk(7D)

SunOS 5.10							 27 November 2000							   chs(7D)