Hi,
I am having trouble getting an issue sorted out, where omniOS 151020 complaints about mismatched blocksizes on some COMSTAR iSCSI LUNS, like this: Sep 7 08:52:07 zfsha02gh79 104 I/O requests are not aligned with 8192 disk sector size in 10 seconds. They are handled through Read Modify Write but the performance is very low! Sep 7 08:52:07 zfsha02gh79 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g600144f0564d504f4f4c3037534c3033 (sd94): Sep 7 08:52:07 zfsha02gh79 79 I/O requests are not aligned with 8192 disk sector size in 10 seconds. They are handled through Read Modify Write but the performance is very low! Sep 7 08:52:16 zfsha02gh79 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g600144f0564d504f4f4c3037534c3132 (sd88): Sep 7 08:52:16 zfsha02gh79 20 I/O requests are not aligned with 8192 disk sector size in 10 seconds. They are handled through Read Modify Write but the performance is very low! Sep 7 08:52:17 zfsha02gh79 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g600144f0564d504f4f4c3038534c3033 (sd110): Sep 7 08:52:17 zfsha02gh79 1 I/O requests are not aligned with 8192 disk sector size in 10 seconds. They are handled through Read Modify Write but the performance is very low! Sep 7 08:52:17 zfsha02gh79 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk@g600144f0564d504f4f4c3037534c3033 (sd94): Sep 7 08:52:17 zfsha02gh79 24 I/O requests are not aligned with 8192 disk sector size in 10 seconds. They are handled through Read Modify Write but the performance is very low! These COMSTAR LUNs are configured to export a blocksize 8k like this: LU Name: 600144F0564D504F4F4C3037534C3132 Operational Status: Online Provider Name : sbd Alias : nfsvmpool07Slot12 View Entry Count : 1 Data File : /dev/rdsk/c3t50015178F364A264d0p1 Meta File : not set Size : 200042414080 Block Size : 8192 Management URL : not set Vendor ID : SUN Product ID : COMSTAR Serial Num : not set Write Protect : Disabled Writeback Cache : Enabled Access State : Active Now, the system seems to recognize the 8k, but for whatever reason, doesn't adjust the block size accordingly. It does that for the 4k LUNs, however, so I am unsure, on how to tackle this? Any tipp, anyone could share? Thanks, Stephan
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