Re: tarr issues with physical tape drive ?

[mlelstv%serpens.de@localhost (Michael van Elst)]

gdt%lexort.com@localhost (Greg Troxel) writes:

>> I typically set/confirm with mt that the device is set to 0/variable
>> block and then search around for a recommended blocking factor for the
>> hardware in question.  For example - my Exabyte Mammoth 8mm (not this
>> device) supposedly is best with 240k (tar -b 480)

>an interesting value.  not 256k!

NetBSD limits I/O requests to MAXPHYS, so the max blocking factor of
tar for tapes is 128 (with GENERIC kernel). The default is 20.