Removing And Replacing A Disk Drive; Device Naming Conventions; Overview Of Disk Drive Replacement Procedures - Sun Microsystems StorEdge D2 Array Installation, Operation And Service Manual

4.3

Removing and Replacing a Disk Drive

The Sun StorEdge D2 Array hardware supports hot-plugging of disk drives as long
as the software framework managing the disk drives is taken into account. The
method you use to replace a faulty disk drive depends on the disk management
application you are using. While the Solaris system software does not provide hot-
plug functionality to shield the operating system from the physical removal and
replacement of a disk drive, you can safely remove a disk drive or add it to the
array's enclosure if you follow the guidelines and procedures in this section.
Caution – As with other high-RAS (reliability availability serviceability) products,
do not pull drives out before stopping activity on the disk drive.
4.3.1

Device Naming Conventions

When formatting disks and looking for disk errors, you need to understand device
naming conventions for disks in arrays. The naming convention for disks in an array
is
c w
For example, if the array is connected to the second connector connected to
controller c2 on the host adapter, the disk drive in the slot with SCSI ID 4 and with
the logical number 2 has the following device names:
/dev/dsk/c2t4d2s[0-7] and /dev/rdsk/c2t4d2s[0-7].
4.3.2

Overview of Disk Drive Replacement Procedures

Hot plugging a disk drive involves the procedures listed below, which appear
with cross-references to the pages where they are described.
4-4 Sun StorEdge D2 Array Installation, Operation, and Service Manual • February 2002
z, where:
t x d y s
w corresponds to the SCSI controller
x corresponds to the SCSI ID number of the disk
y is the logical number for the disk drive
z is the slice (or partition) on the disk