<div dir="ltr">Thanks Lori.<br><br>The drive is an OCZ Vertex4, 256GB.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 29, 2015 at 1:37 PM, L.D. Paniak <span dir="ltr"><<a href="mailto:ldpaniak@fourpisolutions.com" target="_blank">ldpaniak@fourpisolutions.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
With less than 800 power-on hours, this drive would have had to seen
<br>
rather aggressive continuous writes to reach the end of its
endurance.<br>
I doubt you have anything to worry about here.<br>
Raw read error rate is generally not useful info for end users.<br>
Reallocated sector count is probably the attribute to watch on this
drive.<br>
<br>
What make/model is this SSD? Hard to tell if lifetime writes are
LBAs or bytes.<br>
Maybe write 1MB of non-compressible file to the drive and see how
this <br>
value changes. Either way you should be OK.<br>
<br>
The analogous information for the Samsung 840 Pro in my laptop is:<span class=""><br>
Vendor Specific SMART Attributes with Thresholds:<br>
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE
UPDATED WHEN_FAILED RAW_VALUE<br></span>
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail
Always - 0<br>
9 Power_On_Hours 0x0032 099 099 000 Old_age
Always - 4639<br>
12 Power_Cycle_Count 0x0032 098 098 000 Old_age
Always - 1300<br>
177 Wear_Leveling_Count 0x0013 099 099 000 Pre-fail
Always - 3<br>
179 Used_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail
Always - 0<br>
181 Program_Fail_Cnt_Total 0x0032 100 100 010 Old_age
Always - 0<br>
182 Erase_Fail_Count_Total 0x0032 100 100 010 Old_age
Always - 0<br>
183 Runtime_Bad_Block 0x0013 100 100 010 Pre-fail
Always - 0<br>
187 Reported_Uncorrect 0x0032 100 100 000 Old_age
Always - 0<br>
190 Airflow_Temperature_Cel 0x0032 070 055 000 Old_age
Always - 30<br>
195 Hardware_ECC_Recovered 0x001a 200 200 000 Old_age
Always - 0<br>
199 UDMA_CRC_Error_Count 0x003e 100 100 000 Old_age
Always - 0<br>
235 Unknown_Attribute 0x0012 099 099 000 Old_age
Always - 84<br>
241 Total_LBAs_Written 0x0032 099 099 000 Old_age
Always - 4381884472<br>
<br>
<br>
Here LBAs are 512bytes. Attribute 241 says I have written <br>
4381884472*512B = 2.2x10^12B = 2.2TB<br>
I would expect to get 100TB of writes on the drive before starting
to worry.<br>
The drive is rated for 300TB write.<br>
<br>
Tests of this kind of drive have gotten over 2.4PB of writes in
before the drive quit:<br>
<a href="http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead" target="_blank">http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead</a><div><div class="h5"><br>
<br>
<br>
<div>On 07/29/2015 12:52 PM, Khalid
Baheyeldin wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div>So, I had an SSD lying around for a couple of years (long
story, bought to benchmark against spinning rust disks for a
client project). My laptop disk died 1.5 months ago, and when
checking SMART values for it, it was not good.<br>
<br>
Therefore, I decided to put the SSD drive in the laptop, and
copy the spinning drive to it. I blogged on the details of how
to do that separately.<br>
<br>
</div>
When I run SMART on the SSD drives (smartctl --all /dev/sda), I
get the following table:<br>
<div><br>
For those who have been using SSDs for a while, my question
is: should I be worried about lines with ID 1 and 233?<br>
<br>
Vendor Specific SMART Attributes with Thresholds:<br>
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH
TYPE UPDATED WHEN_FAILED RAW_VALUE<br>
1 Raw_Read_Error_Rate 0x0000 006 000 000
Old_age Offline - 6<br>
3 Spin_Up_Time 0x0000 100 100 000
Old_age Offline - 0<br>
4 Start_Stop_Count 0x0000 100 100 000
Old_age Offline - 0<br>
5 Reallocated_Sector_Ct 0x0000 100 100 000
Old_age Offline - 0<br>
9 Power_On_Hours 0x0000 100 100 000
Old_age Offline - 796<br>
12 Power_Cycle_Count 0x0000 100 100 000
Old_age Offline - 74<br>
232 Lifetime_Writes 0x0000 100 100 000
Old_age Offline - <a href="tel:3033270496" value="+13033270496" target="_blank">3033270496</a><br>
233 Media_Wearout_Indicator 0x0000 100 000 000
Old_age Offline - 100<br clear="all">
<br>
-- <br>
<div>Khalid M. Baheyeldin<br>
<a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>
Fast Reliable Drupal<br>
Drupal optimization, development, customization and
consulting.<br>
Simplicity is prerequisite for reliability. -- Edsger
W.Dijkstra<br>
Simplicity is the ultimate sophistication. -- Leonardo da
Vinci<br>
For every complex problem, there is an answer that is clear,
simple, and wrong." -- H.L. Mencken<br>
</div>
</div>
</div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Khalid M. Baheyeldin<br><a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>Fast Reliable Drupal<br>Drupal optimization, development, customization and consulting.<br>Simplicity is prerequisite for reliability. -- Edsger W.Dijkstra<br>Simplicity is the ultimate sophistication. -- Leonardo da Vinci<br>For every complex problem, there is an answer that is clear, simple, and wrong." -- H.L. Mencken<br></div>
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