I have a supermicro 743S2 chasis with 8 hot swappable SCSI bays. I talked to 
supermicro yesterday, I can add 936E1/E2 (15 3.5' SAS/SATA bays) or 216E1/E2 
(24 2.5' SAS/SATA bays) as disk shelf. You can order jbod kit for the two 
chassis and convert them to diskshelf. E2 model supports SAS only while E1 
supports SAS/SATA. Both chassis use LSI expander which should be suported by 
Solaris.

Yes, I use jumbo frame for vmkernel nic, performs well enough, I configured 
multipathing between qlogic FC and iSCSI. FC is always primary and iSCSI as 
failover path, works wonderfully. NFS share is used to store ISO images and VM 
templates.

Performance for my VMware guests are excellent, for every VM, boot time is 
about 10 seconds, write/read speed is also excellent inside guest VMs. The only 
tweak I made to guests is I/O timeout, default is 30 seconds but I made it 120 
seconds in case FC path fails over to iSCSI.
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