Chelsio Communications Terminator 6, Инструкция по установке и эксплуатации, Страница: 175 / 432

Chapter X. iSCSI PDU Offload Target
Chelsio Unified Wire for Linux 175
FILE Mode Storage Device Details
The FILE mode storage device is the most common and versatile mode to access the actual
storage attached to the target system:
The FILE mode can accommodate both block devices and virtual block devices.
The device is accessed in the exclusive mode. The device should not be accessed (or active)
in any way on the target system.
Each device should be used for one and only one iSCSI target.
“SYNC” can be used with FILE mode to make sure the data is flushed to the storage device
before the Target responds back to the Initiator.
To configure a FILE storage device specify
FILE
as the device mode:
TargetDevice=<path to the storage device>[,FILE][,SYNC]
Where:
<path>
Is the path to the actual storage device, such as /dev/sdb for a block
device or /dev/md0 for a software RAID. The path must exist in the
system.
SYNC
When specified, the Target will flush all the data in the system cache to
the storage driver before sending response back to the Initiator.
Example Configuration of FILE Mode Storage
Below is an example:
target:
#<snip>
# software raid /dev/md0 is accessed in FILE mode
TargetDevice=/dev/md0,FILE
#<snip>
BLK Mode Storage Device Details
The BLK mode storage device is suitable for high-speed storage attached to the target system:
•
The BLK mode can accommodate only block devices.
•
The device is accessed in the exclusive mode. The device should not be accessed (or active)
in any way on the target system.
•
Each device should be used for one and only one iSCSI target.
To configure a block storage device specify BLK as the device mode: