[smartmontools-support] Maxtor atlas V disks log many ECC read errors corrected

[David M. <ma...@ca...>]

We have 4 Maxtor ATLAS10K5_147SCA Version JNZH disks on a Sun
Ultra320 dual channel scsi controller.  All of them log tons
of read: (Errors Corrected by ECC, fast) events.  The current
range on these disks is 118K to 1.3M such events.  Lifetime
is around 5700 hours.  I've never seen any type of disk do this, and
in fact none of the other disks on this system (Fujitsu FC disks)
or on any of my other systems list anything but zero in this column.
If it was just one disk I'd think it was failing, but since all 4 of
them do it I'm wondering if this isn't just how these disks work
normally.

One of these disks did recently have two consecutive bad blocks
appear, but that may have been due to the OS not parking the heads
properly on a full power shutdown, since these appeared
immediately after a power off for service.  Anyway, except for
that one disks two bad blocks, and these corrected read events, there
have been no other errors.  They pass the short and long offline
tests.

Should I worry about these many, many corrected read events?

After my signature is a smartctl -a log for one of the disks that
didn't have any bad blocks.

Thanks,

David Mathog
ma...@ca...
Manager, Sequence Analysis Facility, Biology Division, Caltech

# smartctl -a /dev/rdsk/c4t1d0s0
smartctl version 5.36 [sparc-sun-solaris2.8] Copyright (C) 2002-6 Bruce
Allen
Home page is http://smartmontools.sourceforge.net/

Device: MAXTOR   ATLAS10K5_147SCA Version: JNZH
Serial number: D40R9MYK
Device type: disk
Transport protocol: Parallel SCSI (SPI-4)
Local Time is: Mon Jul 31 10:17:07 2006 PDT
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: OK

Current Drive Temperature:     30 C
Manufactured in week 05 of year
Current start stop count:      1074003968 times
Recommended maximum start stop count:  1124401151 times
Elements in grown defect list: 0

Error counter log:
           Errors Corrected by           Total   Correction    
Gigabytes    Total
               ECC          rereads/    errors   algorithm     
processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9
bytes]  errors
read:     118729        0         0         0          0       2366.645
          0
write:         0        0         0         0          0        521.228
          0

Non-medium error count:       48

Last n error events log page

SMART Self-test log
Num  Test              Status                 segment  LifeTime 
LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed                   -    5858           
     - [-   -    -]
# 2  Background long   Completed                   -    5836           
     - [-   -    -]
# 3  Background long   Completed                   -    5811           
     - [-   -    -]
# 4  Background short  Completed                   -    5809           
     - [-   -    -]
# 5  Background long   Completed                   -     308           
     - [-   -    -]
# 6  Background short  Completed                   -     308           
     - [-   -    -]

Long (extended) Self Test duration: 2880 seconds [48.0 minutes]