`<html><body><div style="font-family: Arial; font-size: 12pt; color: #000000"><div>I now its OmniOs forum,question about Nexenta v4.0.4FP02.<br>Maybe issue is common to illumos,<br><br>Getting below error when trying to rollback zvol snapshot,zvol unshared before rollback operation,system rebooted but result was same.<br> <br>any sugesttions?</div><div><br data-mce-bogus="1"></div><div><strong style="color: #000000; font-family: Arial; font-size: 16px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: Arial; font-size: 16px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff;">zfs rollback -r OPOOL/DATA@snap-hourly-1-2016-02-16-130002</strong></div><div><br data-mce-bogus="1"></div><div><strong style="color: #000000; font-family: Arial; font-size: 16px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff;" data-mce-style="color: #000000; font-family: Arial; font-size: 16px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff;">cannot rollback 'OPOOL/DATA': dataset is busy</strong><br> <br><strong></strong></div><div><strong><br data-mce-bogus="1"></strong></div><div><b>Nexenta log:</b></div><div><strong><br data-mce-bogus="1"></strong></div><div><strong>Feb 16 15:35:47 xxx nms[966]: [ID 702911 local0.error] (:1.12) EXCEPTION: SystemCallError: SnapshotContainer::rollback(OPOOL/DATA@snap-hourly-1-2016-02-16-130002,-r): </strong><br><br><strong>[zfs rollback -r OPOOL/DATA@snap-hourly-1-2016-02-16-130002] cannot rollback 'OPOOL/DATA': dataset is busy</strong><br></div></div></body></html>`