01-11-2015
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.
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tms(4) Kernel Interfaces Manual tms(4)
Name
tms - TMSCP magnetic tape interface
Syntax
For UNIBUS, Q-bus:
controller klesiu0 at uba0
controller uq0 at klesiu0 csr 0174500 vector uqintr
tape tms0 at uq0 drive 0
For MSI Bus:
adapter msi0 at nexus?
controller dssc0 at msi0 msinode 0
tape tms0 at dssc0 drive 3
For VAXBI:
controller klesib0 at vaxbi0 node 0
controller uq0 at klesib0 vector uqintr
tape tms0 at uq0 drive 0
controller aie0 at vaxbi? node?
controller bvpssp0 at aie0 vector bvpsspintr
tape tms0 at bvpssp0 drive 0
For MSI Bus:
adapter msi0 at nexus?
controller dssc0 at msi0 msinode 0
tape tms0 at dssc0 drive 0
For VAX CI/HSC:
adapter ci0 at nexus?
adapter ci0 at vaxbi? node?
controller hsc0 at ci0 cinode 6
tape tms0 at hsc0 drive 3
Description
Prior to Version 2.0, this device was referenced by tmscp(4).
The TMSCP driver provides a standard tape drive interface, as described in This is a driver for any controller that adheres to the Tape
Mass Storage Control Protocol (TMSCP). The TMSCP controllers communicate with the host through a packet-oriented protocol termed the Tape
Mass Storage Control Protocol. This driver also supports n-buffered reads and writes to the raw tape interface (used with streaming tape
drives). See for further details.
Tape Support
TK50, TK70, TF70, TU81, TU81e, TA78, TA79, TA81, RV20, TA90, TA90E, TA91
Diagnostics
All diagnostic messages are sent to the error logger subsystem.
Files
See Also
mtio(4), nbuf(4), MAKEDEV(8), uerf(8), tapex(8)
Guide to the Error Logger
tms(4)