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56 Savvio 10K.5 SAS Product Manual, Rev. D
12.2 Dual port support
Savvio SAS drives have two independent ports. These ports may be connected in the same or different SCSI
domains. Each drive port has a unique SAS address.
The two ports have the capability of independent port clocking (e.g. both ports can run at 6Gb/s or the first port
can run at 6Gb/s while the second port runs at 3Gb/s.) The supported link rates are 1.5, 3.0, or 6.0 Gb/s.
Subject to buffer availability, the Savvio drives support:
• Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both
ports at the same time.
• Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving
frames on both ports.
12.3 SCSI commands supported
Table 9 lists the SCSI commands supported by Savvio drives.
Table 9: Supported commands
Command name Command code Supported
Change Definition 40h N
Compare 39h N
Copy 18h N
Copy and Verify 3Ah N
Format Unit [1] 04h Y
DPRY bit supported N
DCRT bit supported Y
STPF bit supported Y
IP bit supported Y
DSP bit supported Y
IMMED bit supported Y
VS (vendor specific) N
Inquiry 12h Y
Date Code page (C1h) Y
Device Behavior page (C3h) Y
Firmware Numbers page (C0h) Y
Implemented Operating Def page (81h) Y
Jumper Settings page (C2h) Y
Supported Vital Product Data page (00h) Y
Unit Serial Number page (80h) Y
Lock-unlock cache 36h N
Log Select 4Ch Y
PCR bit Y
DU bit N
DS bit Y
TSD bit Y