System information

V1.4.2 3/9 Apr/07/2015
OS5 X64 FW 2.05.08
3. RAID volume encryption : AES 256 bits
a. NAS admin has to insert an USB flash disk to save encryption key file on it.
b. To encrypt an existing RAID is not possible. Please do it while creating a new
RAID.
c. NAS performance will drop significantly while using encrypted RAID.
d. The USB flash disk (key file) should exist whenever the NAS reboots/boots up
and doing RAID configuring.
e. Encrypted RAID doesn’t support on-line Expansion, just off-line Expansion is
doable.
f. Encrypted RAID support file system check since V2.03.05.
g. If the USB flash disk (key file) lost or key file modified, the RAID data will
be INACCESSIBLE FOREVER and no way to recover it.
4. Once the RAID created, there will be about 5% data used by EXT3/EXT4 file system. The
capacity stores the journal and inodes; which are necessary to keep RAID data safer.
5. RAID rebuild : in case one HDD failed in RAID 1, 5, 6, 10, 50, and 60 configurations,
please hot unplug failed one and hot plug in new one; then RAID rebuilding will
automatically start. If the replacement is done after NAS shutdown, administrator has to
manually add spare in Admin Web GUI to start the RAID rebuilding.
6. RAID Expansion: When changing the RAID 5 configuration from five smaller disks to five
bigger disks, you have to change one disk at a time and then rebuild the RAID. Lastly,
utilize the newly added capacity from Space Allocation page.
7. iSCSI Target : the maximum numbers of iSCSI target volumes depend on the physical
memory size and also the CPU power of each Thecus NAS. No matter one RAID or
multiple RAID volumes exist in a NAS, the maximum limit will be the same.
Max. No of iSCSI Targets
Model Name
15
N8900V
25
N12000/N12000V/N16000V
50
N8900/N16000
a. For NAS admin without cluster based OS/applications to manage multiple
initiators connected to the same iSCSI volume, we highly recommend every
iSCSI volume is connected by single iSCSI initiator. However, in case NAS
admin has cluster based OS/applications, up to 8 initiators is possible.
b. Uncontrolled concurrent access to the same iSCSI target volume may result
data corruption or un-predicable results.
c. iSCSI target may be disconnected from initiator if other RAID settings on the
same target NAS being altered.
d. Verified iSCSI initiators:
Windows: Microsoft initiator v2.0.4