[SunHELP] remote ufsdump

Big Endian sunhelp at sunhelp.org
Wed May 30 13:18:11 CDT 2001


>  > Regards,
>>          How fast would be the remote dumping speed? does it depend on the
>>  tape drive it self or the connection between them?
>
>usually the tape drive.  a DDS4 drive (the fastest 4mm that i know 
>of) can only
>backup at a data rate of 2.4Mbps (native, compression doesn't make the network
>work harder, it just sends more data per bps) so not even close to a 10Base
>connection, hell, a T1 wouldn't even slow you down that much.
>
>the fastest tape i know of are the Mammoth and AIT 8mm drives. both can do
>roughly 60Mbps so 10Base would seriously limit you, but 100Base would be more
>than adequate.
>
>and if you backup to some freaky beast that has a HDD pool, then you could
>saturate your network, no matter what type it is.
>
>so, in summary, for the most part, modern networking technology far exceeds
>tape drive speeds.  for the time being, you never know what will happen in
>the future, but of course there is always GigE to cover that. :)

check your scales again... Tape drives are rated at megaBYTES per 
second  networks are rated at megaBITS.... I've saturated a 10baseT 
network backing up to a DDS-2 before.

Daniel

>cheers,
>
>-brian
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