Using HP's HP-Branded Ultrium2 LTO2 SCSI drive for my testing in an SL500.

On Wed, 19 Jul 2006, Austin Murphy wrote:

> First, we use encryption, so compression in the drive doesn't work.
> That's why I quoted the native speed.  The HP LTO-2 drives we have do
> not write to tape faster than 30 MB/sec.  Look at the specs of the
> drive on page 19 of this PDF.
> http://www.ultriumlto.com/hp/pdf/11739_div.pdf
>
> IBM's 3580 L23 (LTO-2) drive writes at 35 MB/sec native.
> Quantum's HalfHeight LTO2 drive writes at 26MB/sec native.
> Tandberg's LTO-2 halfHeight drive writes at 24MB/sec native.
>
> Do you have faster LTO-2 drives?
>
> Austin
>
> On 7/19/06, Justin Piszcz <jpiszcz at lucidpixels.com> wrote:
>> 30MB/s? You have some kind of I/O bottleneck there.  Running multiple
>> streams with compression, we get about 80-95MB/s max on LTO2.
>>
>>
>> On Wed, 19 Jul 2006, Austin Murphy wrote:
>>
>>> The max numbers depend on the drive.
>>> My HP LTO-2 drives max out at 30 MB/sec native and match down to 10 MB/sec.
>>> Below the minimum rate the drive stops and starts as it's buffer fills
>>> and empties.  Also known as "shoeshining" due to the need to rewind
>>> and reposition after each stop.
>>>
>>> Austin
>>>
>>> On 7/19/06, Jim Horalek <jimh at federaledge.com> wrote:
>>>> An LTO-3 runs at 80MB/s native and will speed match down to 40MB/s
>>>> An LTO-2 runs at 40MB/s and will speed match down to 19MB/s
>>>> Below these rates the drive stops.
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