Fc disk on Ioscan

[Ranjith M]

Hi All,

How is fc disk notation on ioscan.

sdisk denotes scsi disk or its same for fc disk also.

One more querry on claimed state - does that mean the drivers for that hardware is fine and OS able to see the device properly

Best Regards,

RM

[Torsten.]

Here is an example:

disk 5 0/4/0/0/0/0.12.0.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c1t0d1 /dev/rdsk/c1t0d1


This is a LUN 1 presented from an EVA.

As you can see, it's the sdisk driver too.

[Ranjith M]

So sdisk means scsi disk ? if yes what would be the notation for fc disk

[Rajeev Shukla · Accepted solution]

fc disks also will be represented by OS as scsi disk because in the bottom layer the the FC is transport but uses SCSI protocol.
FC disks means SCSI over Fibre channel

[Torsten.]

sdisk is the SCSI disk driver, but also used for FC disks. The protocol details are a bit complicated, but the fc communication used here is in general encapsulated SCSI.

So briefly speaking, from the system point of view there is no difference between a real SCSI and a FC disk - they are all just disks. (I know, this explanation is very much simplified).

[Jeeshan]

>>sdisk denotes scsi disk or its same for fc disk also.


I think you have got your answer from above. moreover don't confused about fc disk and scsi disk. connectivity is fc but OS uses these disks as a scsi.

>>does that mean the drivers for that hardware is fine and OS able to see the device properly

CLAIMED state means the OS can recognize it.

[Ranjith M]

fc driver same for scsi, claimed state shows OS recognise the device