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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
Change Definition
Compare
Copy
Copy and Verify
Format Unit [1]
DPRY bit supported
DCRT bit supported
STPF bit supported
IP bit supported
DSP bit supported
IMMED bit supported
VS (vendor specific)
Inquiry
Date Code page (C1h)
Device Behavior page (C3h)
Firmware Numbers page (C0h)
Implemented Operating Def page (81h)
Jumper Settings page (C2h)
Supported Vital Product Data page (00h)
Unit Serial Number page (80h)
Lock-unlock cache
Log Select
PCR bit
DU bit
DS bit
TSD bit
56
Command code
Supported
40h
N
39h
N
18h
N
3Ah
N
04h
Y
N
Y
Y
Y
Y
Y
N
12h
Y
Y
Y
Y
Y
Y
Y
Y
36h
N
4Ch
Y
Y
N
Y
Y
Savvio 10K.5 SAS Product Manual, Rev. D
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