User manual

Using S.M.A.R.T. Disk Monitor 219
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Background Media Scan Report @ Sun Jun 8 16:33:04 2008
Accumulated power-on minutes: 134950 [94 days]
Number of background scans performed: 38
Background scanning status: medium scan halted, waiting for interval timer expiration
Background scan percentage completed: 0.00
Defect# PowerOnMins HexBlockNumber State Reassignment Status AdditionalInfo
0 46356 3b46c18 OK recovered via in-place rewrite Recovered error Recovered
data with retries
1 133307 80a34 ERR recovered via in-place rewrite Controller/drive hardware
failed Track following error
Discovered SEAGATE ST3146855SS S/N "3LN29QG4" on /dev/rdsk/c4t17d0s0 (SMART enabled)(140014 MB)
Background Media Scan Report @ Sun Jun 8 16:33:04 2008
Accumulated power-on minutes: 134993 [94 days]
Number of background scans performed: 35
Background scanning status: medium scan halted, waiting for interval timer expiration
Background scan percentage completed: 0.00
Defect# PowerOnMins HexBlockNumber State Reassignment Status AdditionalInfo
0 127 381a8 OK recovered via in-place rewrite Recovered error Recovered
data with retries
1 46378 de80f44 OK recovered via in-place rewrite Recovered error Recovered
data with retries
2 56468 3a44867 OK recovered via in-place rewrite Recovered error Recovered
data with retries
3 86795 a817a7f OK recovered via in-place rewrite Recovered error Recovered
data with retries
4 130059 de863e6 OK recovered via in-place rewrite Recovered error Recovered
data with retries
5 131031 1e240 ERR waiting for WRITE Controller/drive hardware
failed Track following error
6 132850 e01e8c4 OK recovered via in-place rewrite Recovered error Recovered
data with retries
7 133350 1f62 ERR waiting for WRITE Controller/drive hardware
failed Track following error
8 133350 8034a ERR waiting for WRITE Controller/drive hardware
failed Track following error
9 133350 805b4 ERR waiting for WRITE Controller/drive hardware
failed Track following error
10 134778 e01e8fa OK recovered via in-place rewrite Recovered error Recovered
data with retries
Program Ended.
real 0m1.15s
user 0m0.01s
sys 0m0.02s
#
The PowerOnMins field represents the total minutes that the disk has been powered on. The value is non-volatile, so
the minutes increase only while the disk is powered on. The fields marked with ERR correspond to defects that are in
need of repair. These are bad blocks that can not be read. If the disks are part of a software RAID set, then you
should launch a data consistency repair using whatever utility is appropriate for your operating system.
Note that it took a little over one second to report all unrecoverable blocks for nearly one terabyte worth of storage.
The blocks that it reports were discovered during prior automated background media scans (see the -bmse
function in this section).
Using Media Scan Results with Software RAID
BGMS not only improves data integrity by automatically repairing failing blocks by rewriting them, but can also provide
enough information to construct a script to rebuild software RAID volumes when the need arises. For example, if you
have two disks that mirror each other (RAID-1),and smartmon-ux tells you that block #1234 is bad and unreadable,
then you can instruct the operating system to run a consistency repair on the volume to recover. If the media scan
results -bmsr reports that there are no bad blocks, then there is no need to run a manual check for bad blocks that
could take hours or even days if you have a large storage pool.
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