server:~ # smartctl -l selftest  -a /dev/sda
smartctl version 5.30 Copyright (C) 2002-4 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: SEAGATE  ST336607LW       Version: DS09
Serial number: 3JAA0W44
Device type: disk
Transport protocol: Parallel SCSI (SPI-4)
Local Time is: Thu Apr 24 16:58:10 2008 GMT-3
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: OK
Current Drive Temperature:     32 C
Drive Trip Temperature:        68 C

Vendor (Seagate) cache information
  Blocks sent to initiator = 3237502279
  Blocks received from initiator = 1188903151
  Blocks read from cache and sent to initiator = 755942898
  Number of read and write commands whose size <= segment size = 133845171
  Number of read and write commands whose size > segment size = 116061
Vendor (Seagate) factory information
  number of hours powered up = 26458.90
  number of minutes until next internal SMART test = 108

Error counter log:
          Errors Corrected    Total      Total   Correction     Gigabytes    Total
              delay:       [rereads/    errors   algorithm      processed    uncorrected
            minor | major  rewrites]  corrected  invocations   [10^9 bytes]  errors
read:   26403173        0         0  26403173   26403173      15429.489           0
write:         0        0         0         0          0        720.414           0

Non-medium error count:      491

SMART Self-test log
Num  Test              Status                 segment  LifeTime  LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Self test in progress ...   -   NOW                   - [-   -    -]
# 2  Background long   Completed                   - 26458                   - [-   -    -]
# 3  Background long   Completed                   -     5                   - [-   -    -]
# 4  Background short  Completed                   -     4                   - [-   -    -]

Long (extended) Self Test duration: 768 seconds [12.8 minutes]