Hi! Absolutely. In reality, everything happened even longer: 1. I see such strange behavior 2. Reboot 3. Nothing changes 4. I upgrade kernel from 4.20.7 to 5.2.11 and reboot 5. Nothing changes 6. power off/power on 7. Everything starts to work as it should. And in fact, paragraphs 2 to 5 are optional. Power cycle enough. > Yes indeed very funny case, are you sure sdd/sdc etc are not being > reconnected(renumbered) to different drives because of some bus reset or > other failure? Or maybe some udev rule is messing things up? > > > > -----Original Message----- > From: Fyodor Ustinov [mailto:ufm@xxxxxx] > Sent: dinsdag 3 september 2019 14:06 > To: EDH - Manuel Rios Fernandez > Cc: ceph-users > Subject: Re: Strange hardware behavior > > Hi! > > Micron_1100_MTFD > > But not only SSD "too slowly". And HDD - "too quickly". > >> Hi Fyodor >> >> Whats the model of SSD? >> >> Regards >> >> >> -----Mensaje original----- >> De: Fyodor Ustinov <ufm@xxxxxx> >> Enviado el: martes, 3 de septiembre de 2019 13:13 >> Para: ceph-users <ceph-users@xxxxxxx> >> Asunto: Strange hardware behavior >> >> Hi! >> >> I understand that this question is not quite for this mailing list, >> but nonetheless, experts who may be encountered this have gathered > here. >> >> I have 24 servers, and on each, after six months of work, the >> following began to happen: >> >> [root@S-26-5-1-2 cph]# uname -a >> Linux S-26-5-1-2 5.2.11-1.el7.elrepo.x86_64 #1 SMP Thu Aug 29 08:10:52 > >> EDT >> 2019 x86_64 x86_64 x86_64 GNU/Linux >> >> [root@S-26-5-1-2 cph]# dd if=/dev/zero of=/dev/sdc bs=1M count=1000 >> oflag=sync 1048576000 bytes (1.0 GB) copied, 3.76334 s, 279 MB/s >> >> [root@S-26-5-1-2 cph]# dd if=/dev/zero of=/dev/sdd bs=1M count=1000 >> oflag=sync 1048576000 bytes (1.0 GB) copied, 4.54834 s, 231 MB/s >> >> sdc - SSD disk. sdd - HDD. >> >> It can be seen that ssd works somehow slowly, and hdd - too quickly. >> >> Reboot - nothing changes. >> >> And only poweroff/poweron cycle change behavior to normal: >> >> [root@S-26-5-1-2 cph]# dd if=/dev/zero of=/dev/sdc bs=1M count=1000 >> oflag=sync 1048576000 bytes (1.0 GB) copied, 3.24042 s, 324 MB/s >> >> [root@S-26-5-1-2 cph]# dd if=/dev/zero of=/dev/sdd bs=1M count=1000 >> oflag=sync 1048576000 bytes (1.0 GB) copied, 13.7709 s, 76.1 MB/s >> >> Absoluteli nothing in system and ceph log (this servers used for OSD) >> about that. >> >> Perhaps someone has encountered similar behavior? >> >> WBR, >> Fyodor. >> _______________________________________________ >> ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an >> email to ceph-users-leave@xxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an > email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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