topic Re: Difference between DDS3 and DDS4 in StoreEver Tape Storage

Difference between DDS3 and DDS4

Don Spare — Thu, 19 Dec 2002 14:02:31 GMT

Aside from length, are there any other differences between DDS3 and DDS4 tapes? I have drives that came with DDS3 tapes but I am considering the longer tapes to hold more data.
Advice greatly appreciated.

Re: Difference between DDS3 and DDS4

Leif Halvarsson_2 — Thu, 19 Dec 2002 14:31:13 GMT

Hi,
DDS 4 has a media capacity of 20GB uncompressed, 40GB compressed (2-1 ratio).
DDS 3 has a media capacity of 12GB uncompressed, 24GB compressed (2-1 ratio).

DDS 4 media can't be used in a DDS3 drive but a DDS 4 drive is backwards compatible with DDS3.

Re: Difference between DDS3 and DDS4

Don Spare — Thu, 19 Dec 2002 14:34:25 GMT

Thanks. That's what I needed to know.

Re: Difference between DDS3 and DDS4

Eugeny Brychkov — Thu, 19 Dec 2002 15:27:06 GMT

This is very good
http://www.hp.com/products1/storage/products/media/tapebackup_media/tape_dds/compatibility.html
Eugeny

Re: Difference between DDS3 and DDS4

Vincent Farrugia — Thu, 19 Dec 2002 15:52:00 GMT

Hello,

DDS4 is also faster.

3Mb/s native speed (6Mb/s compressed) for the DDS4

1Mb/s native speed (2Mb/s compressed) for the DDS3.

HTH,
Vince