User`s guide

Synology DiskStation User's Guide
Based on DSM 3.2
33 Chapter 4: Manage Storage Space
4 Select the hard drive in the Choose disks section.
5 Follow the wizard to complete the setup.
Note:
 For RAID 5, RAID 5+Spare, and RAID 6 volume or Disk Group, the hard drive size must be larger than the
smallest disk in the volume or Disk Group.
 The status of the volume or the Disk Group must be Normal.
 The status of the added disk must be Initialized or Not Initialized.
 You can also expand your volume with Synology Expansion Unit using the same way.
1
Manage iSCSI Target with Storage Manager
Go to Main Menu > Storage Manager and click the iSCSI Target tab to manage iSCSI Targets on your
Synology DiskStation. You can manage up to 10 or 32
2
iSCSI Targets on one Synology DiskStation, and map
iSCSI LUNs to them.
Term Explanation
iSCSI
iSCSI is an Internet Protocol based storage networking standard for linking data storage facilities. By carrying
SCSI commands over IP networks, iSCSI can facilitate data transfers over local area networks (LANs), wide
area networks (WANs), or the Internet.
Through iSCSI, the space on storage server will be regarded as local disks by client’s operation system. But in
reality, all data transferred to the disk are actually transferred over network to the storage server.
iSCSI Target and LUN
In SCSI terminology, A LUN (logical unit number) represents an individually addressable (logical) SCSI device
that is part of a physical SCSI device (called "Target").
An iSCSI environment emulates the connection to a SCSI hard disk. An iSCSI Target is like a connection
interface, and LUNs are essentially numbered disk drives. When an iSCSI Target is connected by an iSCSI
initiator (a client), all the LUNs mapped to the iSCSI Target are virtually attached to the client’s operation system.
Therefore, Initiators can establish and manage file systems on iSCSI LUNs, as they would a raw SCSI or IDE
hard drive.
To create an iSCSI Target:
1 Click the Create button.
2 Enter the iSCSI Target's information, including Name, IQN, and whether to enable CHAP authentication.
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1
Synology Expansion Unit is supported on specific models only. Please visit www.synology.com.
2
32 iSCSI targets are supported on specific models only. Please visit www.synology.com.