KNOWLEDGE BASE
BackupAssist Backup Software > Knowledge Base > DAT

Main.DAT History

Hide minor edits - Show changes to markup

September 21, 2004, at 09:58 PM by 220.244.224.40
Changed lines 5-26 from:
Advantages:
to:
  • Advantages:
    • blank tapes are cheap
    • the tape drive unit is quiet
    • tapes do not require retensioning
    • most (if not all) DAT drives feature hardware compression

  • Disadvantages:
    • the tape drive units are more expensive than Travan

At our offices, we use a Seagate DDS-3 DAT drive which has served us well.

Effectiveness of hardware compression

Our independent tests have shown that on average, you can expect a 1.4:1 or 1.5:1 compression ratio when backing up a file server (including system files).

Thus, you can expect the following tape capacities:

  • DDS-2: 4 gig native, approximately 6 gig compressed
  • DDS-3: 12 gig native, approximately 18 gig compressed
  • DDS-4: 20 gig native, approximately 30 gig compressed

Compression ratios will vary depending on the type of data.
Deleted line 27:
At our offices, we use a Seagate DDS-3 DAT drive,
September 21, 2004, at 09:53 PM by 220.244.67.198
Changed lines 1-8 from:
Describe DAT here.
to:

Notes on DAT tape drives

We have had very positive experience with DDS DAT tape drives, and can recommend them for their reliability.

Advantages:

At our offices, we use a Seagate DDS-3 DAT drive,

Page last modified on September 21, 2004, at 09:58 PM