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ZFS Failure

Western Digital Drives - The Preferred Drives of FreeNAS and TrueNAS CORE
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JDCynical

Contributor
Joined
Aug 18, 2014
Messages
141
ADA1:
Code:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 119 099 006 Pre-fail Always - 226143560
3 Spin_Up_Time 0x0003 093 093 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 096 096 020 Old_age Always - 4555
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail Always - 215051508


ADA2:
Code:
1 Raw_Read_Error_Rate 0x000f 114 099 006 Pre-fail Always - 72408488
3 Spin_Up_Time 0x0003 093 093 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 103
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail Always - 220676728
Entries 1 and 7 do not look good to me
 

SweetAndLow

Sweet'NASty
Joined
Nov 6, 2013
Messages
6,418

DrKK

FreeNAS Generalissimo
Joined
Oct 15, 2013
Messages
3,630
Attribute #1, "RAW READ ERROR RATE", or whatever it's called, is completely useless and cryptic. It means different things on different drives, and having an obscene number in it for a Seagate is not indicative of any problem. Just ignore attribute #1 on all drives.

Same thing with that #7, "Seek Error Rate", which is notoriously bullshit on Seagates.

Moral of the story: Don't buy Seagates.
 

titan_rw

Guru
Joined
Sep 1, 2012
Messages
584
Attribute #1, "RAW READ ERROR RATE", or whatever it's called, is completely useless and cryptic. It means different things on different drives, and having an obscene number in it for a Seagate is not indicative of any problem. Just ignore attribute #1 on all drives.

Same thing with that #7, "Seek Error Rate", which is notoriously bullshit on Seagates.

Moral of the story: Don't buy Seagates.

Agree to disagree on this one. These attributes are not bullshit at all. They actually give you useful information, like the number of seek errors compared to the total number of seeks. Can be very useful. If you don't understand the raw value, then just pay attention to the normalized value, which is how SMART was originally designed anyway.

It's actually one thing I don't like about WD, is that they don't give you detailed information such as how many error seeks there's been compared to how many total seeks. I can understand why WD doesn't show this though, because then they don't have to deal with confused people seeing non-zero raw values in a field labeled with "error", and wanting to RMA a drive simply because it has >0 total seeks.
 
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