User`s manual

Sans Digital – EN104L+(B) Admin Guide
31
Storage Management - Logical Volume Manager
Logical Volume (LV) is a formatted storage volume in PV, which can be shared by network clients attached to EN104L+(B). In other words,
LV is the network share/folder that can be shared and accessed by network clients.
Note: By default, once the PV is created, the NAS automatically converts the ENTIRE capacity of PV into LV with XFS file system. If other
setting is desired, please delete the existing volume first, and re-create volume(s) in different size and different file system.
Note: by default, all users are given access to a logical volume. To assign exclusive access to specific users or user groups, go to the User and
Access section.
Functions of Logical Volume Manager are
:
1. Create Logical Volume
2. Designate file system or iSCSI to Logical Volume
3. Modify Logical Volume
4. Delete Logical Volume
Create a Logical volume
: To create a new Logical Volume, follow the steps below:
1. Select a Physical Volume with available space from the Physical Volume drop-down list.
2. Enter a unique name in the Volume Name field using up to 15 alphanumeric characters with no spaces.
NOTE: Do not use identical names for Logical Volumes, even if they belong to different Physical Volumes.
3. If it is beneficial to add a description of this Logical Volume to help identify its use, enter that description in the Volume
Description field using up to 50 alphanumeric characters. This is an optional field.
4. Enter the storage size of the Logical Volume in Megabytes in the Volume Size field, keeping in mind the amount of available space.
5. Designate the Logical Volume to select a file system of: ReiserFS, XFS, or iSCSI(target).
Remarks: if SFM (NAS Mirroring and Failover) is intended to be used, please select ReiserFS for it has better resistant to sudden
power lost or sudden shutdown for whatever reasons.
6. Click on Create at the bottom of the page.
7. Repeat the above steps to create additional logical volumes.
To exit and return to the home page, click on Cancel.
Remarks on iSCSI Target Volume
:
If iSCSI target volume is selected instead of XFS or RerserFS, please pay extra attentions to following points:
(1) Do Not use underscore “_“ in the iSCSI target volume name.
(2) Regardless how many iSCSI target volumes you have on the NAS, they are all using port 3260. So from the initiator side, you only
need to specify one single IP plus port 3260, and all the iSCSI volumes on the NAS will be visible. The permission to access each
iSCSI target volume is controlled by the iSCSI ACL section.
(3) If use Microsoft iSCSI initiator to connect to the iSCSI target volume on the NAS, make sure you define the iSCSI volume as “basic
disk” under Windows Disk-Manager, if you define the iSCSI volume as “dynamic disk”, it will not survive the system reboot/restart
and will require “reactivate” upon reboot.
(4) If a successful connection has been established between Microsoft iSCSI initiator and the iSCSI target volume on the NAS, but later
on, you decide to change the IP address on the NAS, then, you must follow the procedure below to re-established the iSCSI
connection:
(a) Log-off the target from MS iSCSI Initiator
(b) Remove the NAS IP from the “Discovery Æ Target Portal” from MS iSCSI Initiator
(c) From AccuNAS, go to: “Network Setting” Æ “TCP/IP Setting” to change the IP
(d) Go to “Network Setting” Æ “iSCSI Service”
First, un-check “iSCSI Target Service”, click “Apply”
Then, re-check “iSCSI Target Service”, click “Apply”
(e) Now, go back to MS iSCSI initiator, from the “Discovery Æ Target Portal”, Enter the new IP address of the NAS with
port 3260.
(f) Now re-do the target logon.
Fail to follow these steps may cause “authentication” failure after changing the IP of the NAS.