TS-410 iscsi

[riccardo1981]

Hi all,

i buy the TS 410 NAS. Now i wuold to create some Virtual Disk with iscsi. I watch these two guide:
http://www.qnap.com/pro_application.asp?ap_id=214
http://www.qnap.com/pro_application.asp?ap_id=135

I create the isci LUN and the status of iscsi target list are all "Ready".
So the next step i create the Virtual Disk with Add Virtual Disk, I choose the IP address and I get a remote disk.
At this point there's a problem. If i try to format and mount a disk of 1GB the operation is successful but if i try to format a disk of 5 GB or 100-120 or another size after the format the status remains unmount.
Why ?
Thanks all
Riccardo

[QNAPJason]

Hi Ricardo,
It's possible to create iSCSI targets larger than 1GB.

May I know:
1. are you trying to mount the same iSCSI targets on the same NAS as VDD?

2. did you use "Thin-Provisioning" or "Allocate Now"?

Ususally iSCSI targets are created for Windows, Macs, and other platforms to mount.
The VDD is used to mount iSCSI targets found on other remote servers.

Jason

[riccardo1981]

Hi Jason, thanks for the answer... so

1. yes i try to to mount the same iSCSI target on the same NAS
2. i use "Thin-Provisioning" not"Allocate Now"

Thank you
Riccardo

[schumaku]

Ciao Riccardo,

1. yes i try to to mount the same iSCSI target on the same NAS

Nice observation by Jason ... This makes absolutely no sense at all.

Please reconsider why you need to configure iSCSI targets - what is the exact purpose?

-Kurt.

[riccardo1981]

I haven't a specific porpouse , i would create a virtual disk of 100 GB or 200 GB and i don't understand why with a 1GB is all right with another size ( 5-10-20-50-100 or above) i have these problems...

[schumaku]

Well, creating iSCSI targets and LUN is ok, but why in hevaen map these back to the NAS'Virtual Disk Drives please?

[riccardo1981]

So once create a iscsi target lun i would assign a remote disk, so i use the virtual disk drive

[schumaku]

There is no need to map an iSCSI target on the NAS using VDD (Virtual Disk Drive). This is only required, if you have to mount a iSCSI target located on a different SAN or NAS system from this single NAS ... only.

Again, I still don't have the "big view" on your ideas on how to use the NAS.

a) Please consider using simple shares instead, e.g. Windows File shares, AFS or SMB for OS X, NFS for Linux ... iSCSI is a pain in the back, if you don't have a very specific purpose where iSCSI is a must. Not even for virtual machines (e.g. VMware) iSCSI is a must, VMware drives can be mapped by NFS, too.

b) For a specific purpose (LAN boot, virtual machines, ...) of course you can create the iSCSI targets, and mount these using an iSCSI initiator e.g. on Windows, OS X, Linux, ... Be aware you are losing a lot of possibilities (access from more than one system, what in iSCSI requires a cluster file system available on server software only), replication, on-line backup, flexible storage space, ... when going iSCSI.

Greetings,

-Kurt.