User Guide

Setting Description
Disk Temperature Alarm Enable this feature to monitor the disk temperatures. QTS displays a
warning when the disk temperature reaches the specified value. You can set
separate alerts for hard disk drives and solid state drives.
TLER/ERC timer (seconds): Enable this feature to specify how long before QTS flags a disk as
unresponsive.
A disk temporarily becomes unresponsive when it encounters a read or
write error, which it tries to fix. QTS might interpret this unresponsiveness as
disk failure, and automatically initiate a rebuild of the disks in the RAID
group. Enabling this feature ensures that a disk has sufficient time to
recover from a read or write error.
Tip
This setting is usually known as Error recovery control
(ERC), Time-limited error recovery (TLER) or Command
completion time limit (CCTL), depending on the
manufacturer.
Snapshot Settings
Setting Description
Smart snapshot space
management
Enable this feature to delete the oldest snapshots when the space available
for storing snapshots (guaranteed snapshot space plus free storage pool
space) is less than 32GB. QTS excludes the last snapshot taken, or
snapshots that are set to be kept permanently. If QTS is unable to create
32GB of free snapshot space, then it does not take any new snapshots.
Enable File Station Snapshot
Directory for administrators
Enable this feature to consolidate the available snapshots into one folder on
File Station. You can restore files and folders from the snapshot directory by
copying and then pasting into a NAS shared folder.
Make snapshot directory
(@Recently-Snapshot)
visible in shared folder root
Enable this feature to show a special read-only folder at the root level of
each shared folder. Making the folder visible allows users to browse its
contents and restore previous versions of files using copy and paste.
When the number of
snapshots reaches maximum
Specify the default QTS behavior after the maximum number of snapshots
for any volume, LUN or NAS is reached. You can choose to overwrite the
oldest available snapshots or to stop taking snapshots.
The maximum number of snapshots depends on your NAS model. For
details, see Snapshot Storage Limitations.
Use timezone GMT+0 for all
new snapshots
Enable this feature to use the GMT+0 time zone in the file names of new
snapshots. This file naming convention can simplify snapshot management
especially when working with snapshots from NAS devices on different time
zones.
This setting only applies to new snapshots. Existing snapshots are not
renamed.
Show hidden files in
Snapshot Manager
Enable this feature to display hidden files in Snapshot Manager.
The setting does not affect files inside the File Station Snapshot Directory.
QTS 4.3.4 Getting Started Guide
Storage & Snapshots 52