Ariel, Sorry I cannot share any images. It was crashing through the night. Before I write the new boot I will take a screenshot if possible.
On Sun, Jul 22, 2018, 6:52 AM ariel sabiguero yawelak <asabi...@fing.edu.uy> wrote: > Cheap drives (I use Crucial, AMD Radeon and Kingston) accept 3.000 > rewrites per memory block. There are a few of interesting attributes you > can check from SMART. These are from my laptop (Crucial_CT960M500SSD1) > > > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED > WHEN_FAILED RAW_VALUE > 9 Power_On_Hours 0x0032 100 100 000 Old_age > Always - 8611 > 12 Power_Cycle_Count 0x0032 100 100 000 Old_age > Always - 4800 > 173 Ave_Block-Erase_Count 0x0032 096 096 000 Old_age > Always - 134 > 180 Unused_Reserve_NAND_Blk 0x0033 000 000 000 Pre-fail > Always - 16523 > 202 Percent_Lifetime_Used 0x0031 096 096 000 Pre-fail > Offline - 4 > 206 Write_Error_Rate 0x000e 100 100 000 Old_age > Always - 0 > 210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age > Always - 0 > 246 Total_Host_Sector_Write 0x0032 100 100 --- Old_age > Always - 19329755627 > 247 Host_Program_Page_Count 0x0032 100 100 --- Old_age > Always - 616802682 > 248 Bckgnd_Program_Page_Cnt 0x0032 100 100 --- Old_age > Always - 3344366909 > > > Attribute 173 states that, on average, each block was erased 134 times, > and states that it is about 4% of the liftime of the drive (attribute 202) > was used. Check those/similar values on your drive. 4% on 8.611hs suggests > that I can continue to use the drive another 23 more years. > > A few things you should consider: > > - There is no wear from reading > - You should have as much free space as possible in order to level the > wearing. If your filesystem is pretty much full, all the wear-leveing will > occur on those few blocks that are released and re-used. If you only have > one block left, you will kill it in 3000 writes :-) > - Your filesystem shouls be aware that it is running on SSD in order > to mark blocks as free (so the SSD can do it's magic). I finally dropped > reiserfs for this reason. > - lot more things to consider, but these are the most relevant IMHO > - YMMV > > > Would you like to share your counters? Filesystem? application? > > regards > > ariel > > El 22/07/18 a las 04:02, Jonathan Engwall escribió: > > Does 345 power_on_hours seem like "old age" > Not happy. Thanks for the CEPH tip. > > On Sat, Jul 21, 2018, 11:30 PM Jonathan Engwall < > engwalljonathanther...@gmail.com> wrote: > >> I built up a couple r610 dells with the idea that they would boot from >> ssd through a usb external drive. The cheap external drives might be the >> real culprits. I have to think about that. >> The latest drive to fail was a Kingston and I think it was new. >> There is a write limit on some ssds? >> Lately I have been building trying to crosscompile the cray xmp >> simulator. It has thousands of targets. But earlier this week afterI >> installed openvswitch was when the trouble began. >> Jonathan Engwall >> >> On Sat, Jul 21, 2018, 10:44 PM John Hearns via Beowulf < >> beowulf@beowulf.org> wrote: >> >>> I forgot the main purpose of the Internet. My bad. >>> >You don't say for which purpose the SSDs are being used. >>> Storing cat pics? >>> >>> On 22 July 2018 at 07:41, John Hearns <hear...@googlemail.com> wrote: >>> >>>> You don't say for which purpose the SSDs are being used. >>>> In your laptop? >>>> As system disks in HPC compute nodes? >>>> Journalling drives in a parallel filesystem? >>>> Data storage drives in a parallel filesystem? >>>> >>>> Over on the CEPH mailing list there are regular topics on choice of >>>> SSDs. I would advise going over there and asking the same question. >>>> >>>> Also you don't say how they are failing. >>>> Are these consumer grade drives or data centre grade drives? >>>> Consumer drives have much, much lower 'drive writes per day' >>>> >>>> Two jobs ago I would have said the go-to data centre drives were Intel. >>>> >>>> Also one comment specific to HPC. I found that SSD drives dont 'get >>>> sick' like spinning drives, >>>> ie you dont see syslog messages about blocks failing to be >>>> read/written. They just fail. >>>> Also two jobs ago I though that SMART checks were not picking up >>>> failing SSDs. >>>> I believe that you can monitor them if you choose the correct counters. >>>> Anyone? >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> On 22 July 2018 at 07:32, Jonathan Aquilina <jaquil...@eagleeyet.net> >>>> wrote: >>>> >>>>> What Ones are you currently getting? >>>>> >>>>> Sent from my iPhone >>>>> >>>>> > On 22 Jul 2018, at 05:42, Jonathan Engwall < >>>>> engwalljonathanther...@gmail.com> wrote: >>>>> > >>>>> > I am not happy with the SSDs I am using. I am buying another sad >>>>> every couple weeks. >>>>> > Fast sure, but my productivity right now is zero. >>>>> > Are there any recommendations on reliable ssd brands? >>>>> > Jonathan Engwall >>>>> > _______________________________________________ >>>>> > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin >>>>> Computing >>>>> > To change your subscription (digest mode or unsubscribe) visit >>>>> http://www.beowulf.org/mailman/listinfo/beowulf >>>>> >>>>> _______________________________________________ >>>>> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin >>>>> Computing >>>>> To change your subscription (digest mode or unsubscribe) visit >>>>> http://www.beowulf.org/mailman/listinfo/beowulf >>>>> >>>> >>>> >>> _______________________________________________ >>> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >>> To change your subscription (digest mode or unsubscribe) visit >>> http://www.beowulf.org/mailman/listinfo/beowulf >>> >> > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf >
_______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
