Re: [zfs-discuss] Migrate from iscsitgt to comstar?

2009-09-22 Thread Peter Cudhea
cc'ing to storage-discuss where this topic also came up recently. By default for most backing stores, COMSTAR will put its disk metadata in the first 64K of the backing store as you say. So if you take a backing store disk that is in use as an iscsitgt LUN and then run "sbdadm create-lu /pa

Re: [zfs-discuss] Poor iSCSI performance [SEC=PERSONAL]

2009-08-25 Thread Peter Cudhea
The ZFS set shareiscsi=on mechanism is only used with the iscsitgt and not with COMSTAR iscsi/target. Since you shifted to using iscsi/target, it should not be working for you now. Could it be that somehow you ended up with both kinds of target (iscsitgt and comstar iscsi/target) running at

Re: [zfs-discuss] Supermicro AOC-SAT2-MV8 hang when drive removed

2008-07-30 Thread Peter Cudhea
h the customer's complaint that the change in state from "working" to "not working" is taking too long seems pretty valid. Peter Neil Perrin wrote: > > > Peter Cudhea wrote: >> Your point is well taken that ZFS should not duplicate functionality >> t

Re: [zfs-discuss] Supermicro AOC-SAT2-MV8 hang when drive removed

2008-07-30 Thread Peter Cudhea
Your point is well taken that ZFS should not duplicate functionality that is already or should be available at the device driver level.In this case, I think it misses the point of what ZFS should be doing that it is not. ZFS does its own periodic commits to the disk, and it knows if those