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8-10 Sun MediaCenter Server Administrator’s Guide • December 1997
The meta-file for the MFS is stored in /var/opt/SUNWsms/MFS. Use the Solaris
format command to obtain the SCSI target numbers used as input for mkmfs. The
preceding example assumes you use slice 2 (s2) to stand for the entire disk. Slice 2 is
one of the default slice assignments in effect when you install Solaris.
8.3 Replacing a Failed Disk
The Sun MediaCenter server’s parity mechanism provides that, in the event of a
single disk failure, the server continues to deliver streams with no user-perceptible
loss in performance. If you do experience a single failed disk, you can replace the
failed disk with a new disk without interrupting the server’s delivery of video bit
streams.
Note – For Sun MediaCenter servers equipped with SPARCstorage MultiPack
enclosures, remove the side cover on the enclosure and check the lights on the disk
modules. When the server is delivering content, you should see the lights for all of
the data disks blink, while the light for the parity disk (the bottom disk on the right
as you face the left side of the enclosure) is lit but unblinking. If you see the light for
a parity disk blinking, it indicates a failed data disk for that enclosure. As content is
being delivered, you should be able to spot the data disk whose light is not blinking.
For the purposes of the Sun MediaCenter server, a disk is not failed until you receive
a console message such as the following:
The most effective method for detecting MFS disk failure is to use the WebAdmin
tool to monitor the server. See Section 8.1, “Monitoring MFS Disks,” for a discussion
of ways you can detect disk failures.
If you receive a “disk failed” message, use the mfs repair command, with the
options described below, to return your MFS to the state it was in prior to disk
failure. The mfs repair command is described in detail in the Sun MediaCenter
Server Service Manual.
1. After receiving a “disk failed” message, as shown above, enter the following
command:
WARNING: data disk 0x80009a (32,154) FAILED
server# mfs repair -s
drive /dev/rdsk/c1t4d0s2 (dev 0x80009a) is FAILED