Allocation Description
Thin provisioning QTS allocates storage pool space only when
needed, such as when data is being written to the
LUN. This ensures efficient use of space but there is
no guarantee that space will be available.
5. Click Next.
6. Configure the following LUN settings.
Setting Description
LUN name • Length: 1 to 32 characters
• Valid characters: 0-9, a-z, A-Z, underscore (_)
LUN capacity Specify the maximum capacity of the LUN. The maximum capacity
depends on the LUN allocation method:
• Thick provisioning: Equal to the amount of free space in the
parent storage pool.
• Thin provisioning: 250 TB
Tip
Select Maximum to allocate all remaining free
space to the LUN.
7. Optional: Configure any of the following advanced settings.
Setting Description
Sector size Changing the sector size to 4 KB increases LUN performance for
specific applications and disk types.
Important
VMware does not currently support a 4 KB sector
size.
Alert threshold QTS issues a warning notification when the percentage of used
LUN space is equal to or above the specified threshold.
Accelerate performance with SSD
cache
The SSD cache will be used to improve LUN access performance.
Important
This setting is only available when the SSD cache
is enabled.
Report volatile write cache for data
safety
When enabled, QTS informs iSCSI initiators connected to this
LUN that volatile write-cache is being used on the NAS. As a
result, initiators might frequently tell QTS to flush cached LUN data
to disk, which increases data safety but decreases LUN
performance.
QTS 4.5.x User Guide
iSCSI & Fibre Channel 304
To Next Page
Loading...
Need help?
General
