> Hello,
> I'm having some issues with iSCSI target performance.
> Recently I made a 1TB ZVOL, mounted it on windows 7
> Ultimate (NTFS) with Microsoft's iSCSI initiator. But
> the performance, in layman's terms, just sucks.
> 
> Version is SunOS solaris 5.11 snv_123 i86pc i386
> i86pc
> 
> Athlon64 2800+, 4x500GB SATA2 drives (WD Caviar
> Green) in raidz, 3GB RAM. Onboard nvidia sata and
> gigabit ethernet.

Amount of memory is rather low for zfs. 

> So, two questions:
> 1) Why does the shareiscsi=on option create the
> target with rdsk if it is much slower?
> 2) Any suggestions for improving performance?
> 
> Thanks in advance,
> Hernan

shareiscsi is outdated, you should use much advanced and improved COMSTAR. 
Don't forget to check if writeback is enabled on LUN - writethrough mode is too 
slow usually. 

--
Roman 
ro...@naumenko.ca
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