SSD SMART attributes
Franc Zabkar
ID Description
-----------------------------
170 (AAh) Reserved Block Count
171 (ABh) Program Fail Count
172 (ACh) Erase Fail Count
173 (ADh) Wear Leveling Count
174 (AEh) Unexpected Power Loss
I expect that they are SSD attributes only.
See http://www.hdat2.com/files/hdat2en_v11.pdf
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
cal...@fly.srk.fer.hr.invalid
> The following SMART attributes appear in the documentation for HDAT2:
> ID Description
> -----------------------------
> 170 (AAh) Reserved Block Count
> 171 (ABh) Program Fail Count
> 172 (ACh) Erase Fail Count
> 173 (ADh) Wear Leveling Count
> 174 (AEh) Unexpected Power Loss
> I expect that they are SSD attributes only.
> See http://www.hdat2.com/files/hdat2en_v11.pdf
Wear leveling is SSD-only feature...
Reserved block count can be applied to both SSD and rotational drives...
Unexpected power loss? I think it can be applied to both technologies...
Erase fail count - SSD only...
Program fail count - SSD only...
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Franc Zabkar
cal...@fly.srk.fer.hr.invalid put finger to keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> kenjka:
>> The following SMART attributes appear in the documentation for HDAT2:
>
>> ID Description
>> -----------------------------
>> 170 (AAh) Reserved Block Count
>> 171 (ABh) Program Fail Count
>> 172 (ACh) Erase Fail Count
>> 173 (ADh) Wear Leveling Count
>> 174 (AEh) Unexpected Power Loss
>
>> I expect that they are SSD attributes only.
>
>> See http://www.hdat2.com/files/hdat2en_v11.pdf
>
>
>Wear leveling is SSD-only feature...
>
>Reserved block count can be applied to both SSD and rotational drives...
>
>Unexpected power loss? I think it can be applied to both technologies...
>
>Erase fail count - SSD only...
>
>Program fail count - SSD only...
I suspect that the above attributes were introduced as a group by one
SSD manufacturer.
The list of attributes also includes the following:
99 (63h) Average FHC (Maxtor)
100 (64h) Erase/Program cycles (Maxtor) ... ???
101 (65h) Maximum FHC (Maxtor)
FHC = flying height control ???
Other interesting attributes are ...
241 (F1h) Total LBA Write (IBM)
242 (F2h) Total LBA Read (IBM)
Franc Zabkar
<fza...@iinternode.on.net> put finger to keyboard and composed:
I've found quite a few more SSD & CompactFlash SMART attributes, with
descriptions:
http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
Arno
> On Tue, 20 Oct 2009 07:00:41 +1100, Franc Zabkar
> <fza...@iinternode.on.net> put finger to keyboard and composed:
> I've found quite a few more SSD & CompactFlash SMART attributes, with
> descriptions:
> http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
Interesting!
Lets see what mine (OCZ Core 32GB) supports:
9 with a raw value of 0, i.e. meaningless
12 with a raw value of 3950, that does not seem to change, again
meaningless
194 Temperature, works
229, 232, 233, 234, 235: Still unknown
A bit disapointing. Not your fault of course.
Arno
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: ar...@wagner.name
GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
----
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Franc Zabkar
keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> wrote:
>> On Tue, 20 Oct 2009 07:00:41 +1100, Franc Zabkar
>> <fza...@iinternode.on.net> put finger to keyboard and composed:
>
>> I've found quite a few more SSD & CompactFlash SMART attributes, with
>> descriptions:
>
>> http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
>
>Interesting!
>
>Lets see what mine (OCZ Core 32GB) supports:
>
> 9 with a raw value of 0, i.e. meaningless
> 12 with a raw value of 3950, that does not seem to change, again
> meaningless
>194 Temperature, works
>229, 232, 233, 234, 235: Still unknown
>
>A bit disapointing. Not your fault of course.
>
>Arno
On 19 Jan 2009 21:02:28 GMT your SMART stats were:
9 Power_On_Hours 0x0032 100 100 000 - 0
12 Power_Cycle_Count 0x0032 100 100 000 - 241
194 Temperature_Celsius 0x0007 032 100 000 - 0
229 Unknown_Attribute 0x0002 100 000 000 - 259986015180268
232 Unknown_Attribute 0x0002 100 048 000 - 9028846498104
233 Unknown_Attribute 0x0002 100 000 000 - 0
234 Unknown_Attribute 0x0002 100 000 000 - 592722311424
235 Unknown_Attribute 0x0002 100 000 000 - 187423
Was that a different device?
Franc Zabkar
keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> wrote:
>> On Tue, 20 Oct 2009 07:00:41 +1100, Franc Zabkar
>> <fza...@iinternode.on.net> put finger to keyboard and composed:
>
>> I've found quite a few more SSD & CompactFlash SMART attributes, with
>> descriptions:
>
>> http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
>
>Interesting!
>
>Lets see what mine (OCZ Core 32GB) supports:
>
> 9 with a raw value of 0, i.e. meaningless
> 12 with a raw value of 3950, that does not seem to change, again
> meaningless
>194 Temperature, works
>229, 232, 233, 234, 235: Still unknown
>
>A bit disapointing. Not your fault of course.
>
>Arno
Try Hard Disk Sentinel for Linux:
http://www.hdsentinel.com/hdslin.php
Solid State Disk Compatibility:
http://www.hdsentinel.com/compatibility_ssd.php
Arno
Hmm. No. Let me check again.
Ok, seems temperature is stuck at cooked 32, which means it
does not actually work. My mistake. Speedfan seems to
display temerature though, and it does raise slightly after
power on and makes sense. No idea what it does or where it gets
the data.
Attribute 12 is now 3956, so it might actually be a device
reset count, not a power cycle count. I had one power-cycle
since yesterday, but a number of reboots.
The other attributes are exactly the same as January, except for
234, which is now raw 571364925191.
Arno
Ah, found it. Speedfan swaps HD0 and HD1 in display for some reasonm
probably a bug. This means it does not get temperature from the
SSD either.
Franc Zabkar
keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> wrote:
>> On 19 Jan 2009 21:02:28 GMT your SMART stats were:
>
>> 9 Power_On_Hours 0x0032 100 100 000 - 0
>
>> 12 Power_Cycle_Count 0x0032 100 100 000 - 241
>
>> 194 Temperature_Celsius 0x0007 032 100 000 - 0
>
>> 229 Unknown_Attribute 0x0002 100 000 000 - 259986015180268
>
>> 232 Unknown_Attribute 0x0002 100 048 000 - 9028846498104
>
>> 233 Unknown_Attribute 0x0002 100 000 000 - 0
>
>> 234 Unknown_Attribute 0x0002 100 000 000 - 592722311424
>
>> 235 Unknown_Attribute 0x0002 100 000 000 - 187423
>
>> Was that a different device?
>
>Hmm. No. Let me check again.
>
>Ok, seems temperature is stuck at cooked 32, which means it
>does not actually work. My mistake. Speedfan seems to
>display temerature though, and it does raise slightly after
>power on and makes sense. No idea what it does or where it gets
>the data.
>
>Attribute 12 is now 3956, so it might actually be a device
>reset count, not a power cycle count. I had one power-cycle
>since yesterday, but a number of reboots.
>
>The other attributes are exactly the same as January, except for
>234, which is now raw 571364925191.
>
>Arno
Attribute 234 looks like it may be multibyte. For example, some bytes
have increased by 7, another has fallen by 5.
592722311424 = 0x008a0100b900
571364925191 = 0x00850800df07
Attribute 232 looks suspiciously like an ASCII string. Aside from the
leading 08, "3631303138" is an ASCII numeric string, "61018".
9028846498104 = 0x083631303138
I can't see any pattern in the following:
259986015180268 = 0xec74b614d5ec
187423 = 0x00000002dc1f
Franc Zabkar
keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> wrote:
>> On Tue, 20 Oct 2009 07:00:41 +1100, Franc Zabkar
>> <fza...@iinternode.on.net> put finger to keyboard and composed:
>
>> I've found quite a few more SSD & CompactFlash SMART attributes, with
>> descriptions:
>
>> http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
>
>Interesting!
>
>Lets see what mine (OCZ Core 32GB) supports:
>
> 9 with a raw value of 0, i.e. meaningless
> 12 with a raw value of 3950, that does not seem to change, again
> meaningless
>194 Temperature, works
>229, 232, 233, 234, 235: Still unknown
See pages 25 and 26 of the following document.
Transcend 2.5" Solid State Disk datasheet:
http://www.transcend.co.jp/support/dlcenter/datasheet/SSD25-JMI%20Datasheet%20v1.08.pdf
The attributes look very similar to yours. However, they are 8 bytes
long, not the usual 6 bytes for HD SMART attributes.
It appears that I may have been correct about the ASCII values. Do
they correspond to the firmware version or date, ie October 18, 2006?
Franc Zabkar
<fza...@iinternode.on.net> put finger to keyboard and composed:
>On 25 Oct 2009 21:33:05 GMT, Arno <m...@privacy.net> put finger to
>keyboard and composed:
>
>>Franc Zabkar <fza...@iinternode.on.net> wrote:
>>> On Tue, 20 Oct 2009 07:00:41 +1100, Franc Zabkar
>>> <fza...@iinternode.on.net> put finger to keyboard and composed:
>>
>>> I've found quite a few more SSD & CompactFlash SMART attributes, with
>>> descriptions:
>>
>>> http://www.users.on.net/~fzabkar/SSD_CF_attribs.txt
>>
>>Interesting!
>>
>>Lets see what mine (OCZ Core 32GB) supports:
>>
>> 9 with a raw value of 0, i.e. meaningless
>> 12 with a raw value of 3950, that does not seem to change, again
>> meaningless
>>194 Temperature, works
>>229, 232, 233, 234, 235: Still unknown
>
>See pages 25 and 26 of the following document.
>
>Transcend 2.5" Solid State Disk datasheet:
>http://www.transcend.co.jp/support/dlcenter/datasheet/SSD25-JMI%20Datasheet%20v1.08.pdf
>
>The attributes look very similar to yours. However, they are 8 bytes
>long, not the usual 6 bytes for HD SMART attributes.
>
>It appears that I may have been correct about the ASCII values. Do
>they correspond to the firmware version or date, ie October 18, 2006?
Here are more data.
http://www.transcend.co.jp/support/dlcenter/datasheet/SSD25S-JMI%20Datasheet%20v1.05.pdf
ID(Hex) Description Reference
----------------------------------------------
0C Power Cycle Count (Supported)
09 Power On Hours Count (Not Supported)
C2 Temperature (Not Supported)
E5 Halt System ID, Flash ID (Table 1)
E8 Firmware version information (Table 2)
E9 ECC Fail Record (Table 3)
EA Average Erase Count, Max Erase Count (Table 4)
EB Good Block Count, System Block Count (Table 5)
EC-EF Reserved
F1-FF Reserved
Table 2
-------
Byte Description
----------------------------
0 Year (High Byte, ASCII)
1 Year (Low Byte, ASCII)
2 Month (High Byte, ASCII)
3 Month (Low Byte, ASCII)
4 Day (High Byte, ASCII)
5 Day (Low Byte, ASCII)
6 Channels (binary)
7 Banks (binary)
It appears that the 6 bytes returned by a typical HD SMART utility are
bytes 1 through 6.
This means your YYMMDD date code is x81016, ie October 16, 20x8.
Your SSD would then have 8 channels.
Franc Zabkar
<fza...@iinternode.on.net> put finger to keyboard and composed:
According to table 4 of the Transcend datasheets, attribute 234 stores
the Average Erase Count and Max Erase Count.
Max Erase Count (Jan / Oct) = 0x00018A / 0x000885
Avg Erase Count (Jan / Oct) = 0x0000b9 / 0x0007DF
>Attribute 232 looks suspiciously like an ASCII string. Aside from the
>leading 08, "3631303138" is an ASCII numeric string, "61018".
>
>9028846498104 = 0x083631303138
>
>I can't see any pattern in the following:
>
>259986015180268 = 0xec74b614d5ec
The above attribute stores the Halt System ID in byte 0 and the Flash
ID in bytes 1 through 7.
>187423 = 0x00000002dc1f--
According to table 5, attribute 235 decodes as follows:
System(Free) Block Count = 0x0200
Good Block Count = 0x--1FDC
Arno
>>187423 = 0x00000002dc1f--
Very nice, so may be something useful in these attributes.
Franc Zabkar
keyboard and composed:
>Franc Zabkar <fza...@iinternode.on.net> wrote:
>> According to table 4 of the Transcend datasheets, attribute 234 stores
>> the Average Erase Count and Max Erase Count.
>
>> Max Erase Count (Jan / Oct) = 0x00018A / 0x000885
>> Avg Erase Count (Jan / Oct) = 0x0000b9 / 0x0007DF
>
>>>Attribute 232 looks suspiciously like an ASCII string. Aside from the
>>>leading 08, "3631303138" is an ASCII numeric string, "61018".
>>>
>>>9028846498104 = 0x083631303138
>>>
>>>I can't see any pattern in the following:
>>>
>>>259986015180268 = 0xec74b614d5ec
>
>> The above attribute stores the Halt System ID in byte 0 and the Flash
>> ID in bytes 1 through 7.
>
>>>187423 = 0x00000002dc1f--
>
>> According to table 5, attribute 235 decodes as follows:
>
>> System(Free) Block Count = 0x0200
>> Good Block Count = 0x--1FDC
>Very nice, so may be something useful in these attributes.
The smartmontools project will shortly be able to correctly analyse
these attributes. At the moment CrystalDiskInfo (Windows) can do it:
http://crystalmark.info/software/CrystalDiskInfo/index-e.html
In the meantime you can get a dump of the 512-byte SMART data block
(with 8-byte raw attribute values) using smartctl in debug mode:
smartctl -a -r ioctl,2