RAID Diagrams
Package Contents
MS2C1/MS2U1/MS2T1.....................................................................
Manual ............................................................................................
Power Cord .....................................................................................
USB 2.0 Cable .................................................................................
eSATA Cable ..................................................................................
(Please contact us in case of missing or damaged items)
Turn the faceplate lock to the unlock
position.
Step 1 Pull the faceplate handle to open the hard
drive faceplate.
Step 2
Insert the hard drive with the connector
towards the back.
Step 3
Power on the unit. Set the unit to the desired RAID mode (RAID 0 / RAID 1 / JBOD / BIG)
by adjusting the RAID switch located on the front panel, and select ‘reset’.
Push the hard drive inwards while closing the
faceplate. Turn the faceplate lock to the lock
position.
Step 4
Installing a Hard Drive
Setting the RAID Mode
1
1
1
1
1
QUICK INSTALLATION GUIDE v1.0
• 3.5” Hard Drive Enclosure with Removable Tray
• Dual host interface: USB 2.0 and eSATA.
• Supports high performance SATA hard drives.
• Ultra quiet operation.
• Vertical placement stand included.
• Durable aluminum housing.
• Both Mac OS X and Windows supported.
• 2-Bay External RAID Enclosure
• RAID design, supports RAID 0, 1.
• eSATA and USB 2.0 (MS2UT) or Firewire 800 & USB 2.0 (MS2UB).
• Drive interface: 3.5” x 2 SATA I/ SATA II hard drives.
• Hot-swappable removable tray.
• Data auto-rebuilding.
• Hard disk, fan and temperature failure detectors.
• 4-Bay External RAID Enclosure
• Supports JBOD for independent access up to four hard drives.
• 1394b x 2 (MS4B), eSATA x 4 (MS4T), USB 2.0 & Port Multiplier (MS4UM).
• Drive interface: 4 x 3.5" SATA I/ SATA II hard drives.
• RAID supported in MS4B (RAID 0) and MS4UM (software RAID 0, 1,
0+1, 5, 5 + spare in Windows).
• OS independent with plug and play capability.
• 5-Bay External RAID 6 Enclosure
• Hardware RAID design, supports RAID 0, 1, 0+1, 3, 5, 6, JBOD & hot
spare disk.
• SCSI Ultra 320 (MR5S1)/ USB 2.0, Firewire 800 & eSATA (MR5CT1).
• Drive interface: 5 x 3.5” SATA I / SATA II hard drives.
• Hot-swappable tray design.
• Hard disk, fan and temperature failure detectors.
Other Sans Digital Products
MS1UT
MS4B/MS4T/MS4UM
MS2UT/MS2UB
MR5S1/MR5CT1
Hardware Diagrams
FRONT
USB LED eSATA LED RESET eSATA USB 2.0 POWER
HDD LED HDD LOCK HANDLE FAN
BACK
Hardware Connections
Unlock Lock
Note: Front panel hard drive handle lock position.
TOWERSTOR TS2UT
COMPUTER REAR PANEL
eSATA
eSATA
eSATA
QUICKINSTALLATIONGUIDE v1.0
TOWERSTO R TS2UT
LED Indications
The front plate LED lights in a variation of blue, red, or purple depending on the unit’s status.
BLUE
HDD INSERTED
FLASHING RED & BLUE
HDD FAILED
PURPLE
ACCESSING DATA
LED OFF
NO HARD DRIVE
FLASHING RED & BLUE
HDD FAILED
FLASHING RED & BLUE
REBUILD TARGET
PURPLE
REBUILD SOURCE
RAID 1 LED Indications
RAID 0
A5
A3
A1
A7
A6
A4
A2
A8
DISK 0 DISK 1
BIG
A3
A2
A1
A4
A7
A6
A5
A8
A9
A12
A11
A10
A13
DISK 0 DISK 1
JBOD
A3
A2
A1
A4
A6
A5
B3
B2
B1
B4
DISK 0 DISK 1
RAID 1
A3
A2
A1
A4
A3
A2
A1
A4
DISK 0 DISK 1
JBOD (Just a Bunch of Disks)
JBOD is not one of the numbered RAID levels. Unlike a concatenated array, the disks
of JBOD appear as individual hard disks, instead of one single large disk. JBOD
accurately describes the underlying physical structure that all RAID structures rely
upon. When a hardware RAID controller is used, it normally defaults to JBOD
configuration for attached disks.
RAID 0 (Striping)
A RAID 0 (also known as a stripe set or striped volume) splits data evenly across two or
more disks (striped) with no information for redundancy. It is important to know that
once one of the hard drive fails, all of the data will be lost. RAID 0 is normally used to
increase performance, although it can also be used as a way to create a small
number of large virtual disks out of a large number of small physical ones.
RAID 1 (Mirroring)
A RAID 1 creates an exact copy (or mirror) of a set of data on two or more disks. This is
useful when read performance or reliability are more important than data storage
capacity. Such an array can only be as big as the smallest member disk. A classic
RAID 1 mirrored pair contains two disks (see diagram), which increases reliability
geometrically over a single disk. Since each member contains a complete copy of
the data, and can be addressed independently.
BIG / Spanning (Concatenated Array)
Spanning or concatenated array is also not RAID, although it is an array. It is a group
of disks connected together, end-to-end, for the purpose of creating a larger logical
disk. Although it is not RAID, it is included here as it is the result of early attempts to
combine multiple disks into a single logical device. There is no redundancy with a
concatenated array. Any performance improvement over a single disk is achieved
because the file-system uses multiple disks. This type of array is usually slower than a
RAID-0 array of the same number of disks.
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