question below... > On Jun 1, 2015, at 9:37 PM, Michael Widmann <[email protected]> wrote: > > > Hopefully someone can help on this maybe "bug" ? > I've read about something like that from Robert Mustacchi ... > > > Here's the config: > > Quadmirror ZFS: 2 Discs in DC1 / 2 Discs in DC2 (works perfect for Metro > Style Cluster) > > If we use iSCSI Disc on this config we get the following: (checked in this > config and even on the same box) > > Here's the error: > c0t600144F0908AC7035000C5005750CEF7d0 Soft Errors: 0 Hard Errors: 10 > Transport Errors: 0 > > > Vendor: SEAGATE Product: ST2000NM0023 Revision: 1.0 Serial No: Z1X0Z1GS > Size: 2000.40GB <2000398868480 bytes> > > Media Error: 0 Device Not Ready: 0 No Device: 10 Recoverable: 0 > > Illegal Request: 0 Predictive Failure Analysis: 0 > > > > c0t600144F0908AC7025000C5005715B7A3d0 Soft Errors: 0 Hard Errors: 10 > Transport Errors: 0 > > > Vendor: SEAGATE Product: ST2000NM0023 Revision: 1.0 Serial No: Z1X0KPAX > Size: 2000.40GB <2000398868480 bytes> > > Media Error: 0 Device Not Ready: 0 No Device: 10 Recoverable: 0 > > Illegal Request: 0 Predictive Failure Analysis: 0 > > > > c0t600144F0908AC7015000C5005743530Bd0 Soft Errors: 0 Hard Errors: 10 > Transport Errors: 0 > > > Vendor: SEAGATE Product: ST2000NM0023 Revision: 1.0 Serial No: Z1X0WQA0 > Size: 2000.40GB <2000398868480 bytes> > > Media Error: 0 Device Not Ready: 0 No Device: 10 Recoverable: 0 > > Illegal Request: 0 Predictive Failure Analysis: 0 > > > > c0t600144F0908AC7275000A7203008BE03d0 Soft Errors: 0 Hard Errors: 9 Transport > Errors: 0 > > > Vendor: STEC Product: ZeusRAM Revision: 1.0 Serial No: STM000185B19 Size: > 8.00GB <7999934464 bytes> > > Media Error: 4 Device Not Ready: 0 No Device: 5 Recoverable: 0 Illegal > Request: 0 Predictive Failure Analysis: 0 > General troubleshooting tip: These are generic summary error reports. The detailed reports, including commands sent that received errors and the SCSI reply are recorded by FMA. Use "fmdump -eV" for a verbose listing of the error reports.
More specific tip: These are also all local disks, no iSCSI involved. The hard/soft/transport error counters are higher-level than the more detailed error counters: media, DNR, recoverable, etc. "No device" means the device wasn't there when a SCSI command was issued to it. These are categorized as "hard" errors, so you'll see both counters increment. > > > zpool import send an SCSI_RESERVATION Command to the Discs to claim it, > this is answered with an SCSI_RESET_TARGET (sic!!!) zpool import knows nothing about disks, so it cannot issue a SCSI reservation. However, if a devices is not responding, or has been reserved away from the node with SCSI-2 reservation, then the sd driver can issue a target reset to the device. The answer lies in the detailed FME ereports. > > There's no SCSI_RESET_LUN in the iSCSI Specs - so during Initialize and > reading configs of Discs the STMF Target got resetted (each disc in DC1 and > DC2) - for some IOPS .... SCSI_RESET_LUN is an sd driver notion. It is equivalent to sending the appropriate reset command to a LUN. For simple SCSI disks, this is the same as a target reset. -- richard > > That seems to be a bug - as it couldn't really be a wanted feature :-) > > > > What we tried for testing: > There are no errors on SAS Discs (physical) > zpool import / export works > BIOS on each disc is the same > > The error just occurs on "import and create (not during operation on the > metro cluster) " > > Any idea on this? > > Thanks in advance > > Mike Tomaselli > smartos-discuss | Archives > <https://www.listbox.com/member/archive/184463/=now> > <https://www.listbox.com/member/archive/rss/184463/21953302-fd56db47> | > Modify <https://www.listbox.com/member/?&;> Your Subscription > <http://www.listbox.com/> ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
