Most small businesses have a small computing environment and limited
expertise in computing and networking. Nonetheless, they have critical data that
must be protected. They want a low cost backup solution that works in their
existing environment and is easy to operate.
The Spectra Logic 2K Ethernet library is one of the solutions. The library
has a built-in iSCSI to SCSI translation engine. It uses Ethernet to connect to
the PC. This networking capability allows the user to share the library among
PCs on an IP network .
Ethernet is a mature technology familiar to many organizations. Ethernet uses
RJ45 connectors similar to RJ21 connectors on telephones. Connecting an Ethernet
cable is as simple as hooking up a phone jack.
Sharing the tape library takes three steps. First, the user installs the
Microsoft iSCSI driver and RSM on the PCs. Second, the user allocates media to
the PCs. In the Microsoft backup application, the user moves the tapes from the
unrecognized media pool to the free media pool. Make sure that no two PCs use
the same tape. Lastly, the user divides the backup window among the PCs and
schedules the PCs to run backup in each of the time slot. If a PC is trying to
access a library that is in use, the PC will get a busy signal and will retry.
The user can set a value for the number of retries.
Below is a sample configuration.
User Environment:
Five Windows 2000, XP or 2003 PCs connect to a fast Ethernet switch. Each has
30GB of user data.
Installation:
• Purchase a 15 slot, 1 AIT 2 drive, Spectra 2K iSCSI ($6950 list) and
15 tapes. An AIT2 drive can back up 21.6GB of uncompressed data in an hour.
• Connect the Spectra 2K to the Ethernet switch.
• Install the Microsoft iSCSI driver and RSM on every PC. Click here
for an installation guide.
• Open the Windows backup application on the PC
• Assign 3 tapes to each PC. See Microsoft definitions of media
pools .
• Divide the 10 hour backup window into 5 equal time slots
• Schedule the PCs to run backup in each of the time slot

Solution Cost:
- 1 AIT2 Spectra 2K $6950 (list)
- Ethernet NIC $0
- One switch port $50
- Microsoft Backup Application $0
- Microsoft iSCSI Driver $0
- 15 Tapes $900
- Total $7900
- Cost per PC $1580
Additional References
• Spectra Logic iSCSI
Interoperability Matrix
• Microsoft iSCSI and RSM
Installation Guide
• Microsoft
iSCSI driver download
• Spectra
Logic iSCSI support web page
• Spectra
Logic iSCSI product page
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