WD 400GB SATA Drive In Constant Smart Testing?

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When I write to this disk for a while, I see this in dmesg (only once so far):

[31230.223504] ata6: translated ATA stat/err 0x51/04 to SCSI SK/ASC/ASCQ 0xb/00/00
[31230.223511] ata6: status=0x51 { DriveReady SeekComplete Error }
[31230.223515] ata6: error=0x04 { DriveStatusError }


Is there some sort of smart testing going on constantly? I only get 26-27MB/s on this 400GB/SATA/16MB/7200RPM drive. I use smartmontools to do a daily test. However, even with smart disabled, I get:

# hdparm -t /dev/sde
/dev/sde:
 Timing buffered disk reads:   78 MB in  3.06 seconds =  25.46 MB/sec

Does anyone know if this drive has problems in Linux or something?

[    6.895914]   Vendor: ATA       Model: WDC WD4000KD-00N  Rev: 01.0


It just seems to be that drive that has issues.

Here is a 400GB seagate ata/100:
/dev/hde:
 Timing buffered disk reads:  172 MB in  3.02 seconds =  56.91 MB/sec

Here is a 74GB raptor SATA/150:
/dev/sda:
 Timing buffered disk reads:  204 MB in  3.03 seconds =  67.38 MB/sec

Both drives above are on the same system, so my question is what exactly is wrong with the WD drive? Is it a Linux issue, a drive issue, or?

Does anyone else use this drive, what rates do they get?

What is up with the error in dmesg?


# smartctl -d ata -l selftest /dev/sde
smartctl version 5.34 [i686-pc-linux-gnu] Copyright (C) 2002-5 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA
_of_first_error
# 1 Short offline Completed without error 00% 1094 - # 2 Offline Completed without error 00% 0 - # 3 Offline Completed without error 00% 0 - # 4 Offline Completed without error 00% 0 - # 5 Offline Completed without error 00% 0 - # 6 Offline Completed without error 00% 0 - # 7 Offline Completed without error 00% 0 - # 8 Offline Completed without error 00% 1 - # 9 Short offline Completed without error 00% 810 - #10 Vendor offline Completed without error 30% 65280 - #11 Offline Self-test routine in progress 150% 65535 - #12 Vendor offline Self-test routine in progress 150% 255 - #13 Vendor offline Completed without error 00% 0 - #14 Offline Completed without error 00% 0 - #15 Offline Completed without error 00% 0 - #16 Offline Completed without error 00% 0 - #17 Offline Completed without error 00% 0 - #18 Offline Completed without error 00% 0 - #19 Offline Completed without error 00% 0 - #20 Offline Completed without error 00% 0 - #21 Offline Completed without error 00% 1 -


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