D-Link DSN-3400-10 User's Manual for DSN-3200-10 Valid for firmware 1.6.1 - Page 57

Deleting User Accounts, Managing the xStack Storage Array, Working with Volumes

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5.3.2 Deleting User Accounts If you no longer need a user account, use the following procedure to delete it. 1. On the View menu, click User Accounts. The User Accounts screen appears, with a list of the user accounts that have been defined. 2. Click the user whose account you want to delete, then click the Delete User button. 5.4 Managing the xStack Storage Array This section shows you how to configure and manage storage on the xStack Storage Array. 5.4.1 Working with Volumes A volume is a set of storage blocks organized and presented for use by a customer's server (an iSCSI initiator node). Each volume must be associated with a storage pool, which limits the drives that can be used to hold data for that Volume (only drives in that pool can be used for this volume). Only the Blade A Base Pool can be used for volumes. The iSCSI initiator node sees the volume as a contiguous series of numbered blocks, called Virtual Logical Block Numbers (VLBNs), in the same way that it would see the storage space on a single disk drive. The xStack Storage Array builds a volume from extents. A volume typically consists of extents from several drives. Volume can be organized in several ways (see Table 5-2). Table 5-2 Ways to Organize Volumes Organization JBOD Mirror Stripe Mirrored Stripe Parity Definition One copy of the data is written to the selected Extents. Two copies of all data are written to independent Extents. Distributes one copy of the data among several drives to improve the speed of access. Distributes the data among several drives and then keeps a mirror copy of the blocks on each drive Distributes one copy of the data among several drives and adds parity blocks spread throughout the volume to protect against the loss of any single drive. Redundant No Yes No Yes Yes Striped No No Yes Equivalent to RAID Level - RAID 1 RAID 0 Yes RAID 1+ 0 Yes RAID 5 xStack Storage User's Guide 57

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xStack Storage User’s Guide
57
5.3.2
Deleting User Accounts
If you no longer need a user account, use the following procedure to delete it.
1.
On the
View
menu, click
User Accounts
. The User Accounts screen appears, with a list of the
user accounts that have been defined.
2.
Click the user whose account you want to delete, then click the
Delete User
button.
5.4
Managing the xStack Storage Array
This section shows you how to configure and manage storage on the xStack Storage Array.
5.4.1
Working with Volumes
A volume is a set of storage blocks organized and presented for use by a customer’s server (an
iSCSI initiator node). Each volume must be associated with a storage pool, which limits the drives
that can be used to hold data for that Volume (only drives in that pool can be used for this
volume). Only the Blade A Base Pool can be used for volumes.
The iSCSI initiator node sees the volume as a contiguous series of numbered blocks, called Virtual
Logical Block Numbers (VLBNs), in the same way that it would see the storage space on a single
disk drive. The xStack Storage Array builds a volume from extents. A volume typically consists of
extents from several drives.
Volume can be organized in several ways (see Table 5-2).
Table 5-2 Ways to Organize Volumes
Organization
Definition
Redundant
Striped
Equivalent
to RAID
Level
JBOD
One copy of the data is written to the selected Extents.
No
No
-
Mirror
Two copies of all data are written to independent Extents.
Yes
No
RAID 1
Stripe
Distributes one copy of the data among several drives to
improve the speed of access.
No
Yes
RAID 0
Mirrored Stripe
Distributes the data among several drives and then keeps a
mirror copy of the blocks on each drive
Yes
Yes
RAID 1+ 0
Parity
Distributes one copy of the data among several drives and adds
parity blocks spread throughout the volume to protect against
the loss of any single drive.
Yes
Yes
RAID 5