Hi,

I am studying for the RHCE, and there is this question:

"Configure a system as an iSCSI initiator that persistently mounts an iSCSI target."

Using CentOS 6.

Discover the iscsi targets:

iscsiadm -m discoverydb -t st -p 192.168.122.157 -D

This works.

Then:

service iscsi start

The result:

The iscsi drive will appear as /dev/sg2 . It shows up as a sg device. However, to be usable and be mountable, it needs to be a regular scsi device such as /dev/sdb or /dev/sdc or something.

Why is it appearing as sg device, and not as sd device?

Any ideas what to try next?

Thanks.

Hi there
The Linux sg driver is a upper level SCSI subsystem device driver that is used primarily to handle devices _not_ covered by the other upper level drivers: sd (disks), st (tapes) and sr (CDROMs and DVDs). The sg driver is used for enclosure management, cd writers, applications that read cd audio digitally and scanners. Sg can also be used for less usual tasks performed on disks, tapes and cdroms. Sg is a character device driver which, in some contexts, gives it advantages over block device drivers such as sd and sr. The interface of sg is at the level of SCSI command requests and their associated responses. (copied)
Hope this clears things out...
Regards