Re: System hangs for several minutes (disk IO related)

2013-09-02 Thread Nils Pascal Illenseer
Hi, I see similar hangs on one of our Supermicro servers. We have a ZFS RAID (mirrored stripped vdevs) and when I use zfs receive to receive snapshots the whole system hangs for up to ten or even more minutes at the end. Kernel: latest (9.2-RC3) Adaptec 6805 RAID-Controller provides disks for

Re: System hangs for several minutes (disk IO related)

2013-07-31 Thread Mark Felder
If you Google SmartArray P400 I'm sure you will find tons of horror stories. As soon as I saw that in your post I recalled looking into an issue for a customer not too long ago. In short, it's a very bad controller with tons of issues. I could be mistaking this for another controller, but I'm

Re: System hangs for several minutes (disk IO related)

2013-07-31 Thread John Johnstone
On 7/31/13 9:41 AM, Mark Felder wrote: If you Google SmartArray P400 I'm sure you will find tons of horror stories. As soon as I saw that in your post I recalled looking into an issue for a customer not too long ago. In short, it's a very bad controller with tons of issues. I could be mistaking

System hangs for several minutes (disk IO related)

2013-07-30 Thread Ewald Jenisch
Hi, I'm seeing rather strange behavior on an HP DL585 G5 wrt. disk IO: When there's any disk io the machine completely freezes, i.e. no console input possible, no screen output - complete hang. After some minutes the box comes back to normal again - but sure enough with the next disk io it