From: <stingay_at_email.protected>
Date: Wed, 21 Feb 2007 15:55:48 +1100

Hi Jim,

I think dropping/modifying v211a would be the best bet. As Indra
points out, we would have to use the 180 GB disks for high data rate
recording, which is problematic. Cancelling v194b will not help, as
it only frees up more 180 GB disks.

First choice would be to drop v211a back to 256 Mbps. If 512 Mbps is
critical then v211a should be dropped completely. As Indra also
points out, v211a has no Tid allocation and is therefore disadvantaged
anyway if high sensitivity is critical.

If v211a is dropped completely, we can do some other low data rate
observation instead which can effectively use the 180 GB disks.

Cheers, Steven

On 2/21/07, Chris Phillips <Chris.Phillips_at_csiro.<!--nospam-->au> wrote:
>Message from Jim,
>
>---------------
>Date: Wed, 21 Feb 2007 15:15:46 +1100
>To: Indra Bains <ibains_at_astro.<!--nospam-->swin.edu.au>
>
>Hi Indra,
>
>Thanks for that. I'll contact Enno and see if he doesn't mind
>dropping back to 256, unless Adam or Emil are prepared to make the
>supreme sacrifice? An alternative would be to can cel v194b (sorry
>Phil!). Would that save enough disk to keep v211a at the high rate?
>
>Cheers,
>Jim
>
>--
>Dr Jim Lovell, Jim.Lovell_at_csiro.<!--nospam-->au
>CSIRO Australia Telescope National Facility Ph: (02) 6125 6715
>c/o RSAA, Mt Stromlo Observatory, Fax: (02) 6125 0260
>Cotter Road, Weston ACT 2611
>Australia http://www.atnf.csiro.au/people/Jim.Lovell
>At Tidbinbilla Ph (02) 6201 7842 (RA Lab), x7800 (switch), x7940(shift)
>
>
>
>On 21/02/2007, at 2:13 PM, Indra Bains wrote:
>
>>>
>>> Hi
>>>
>>> We've had a look at the disk allocations for the current schedule.
>>> The way
>>> things stand, with 60 hrs at 512 Mbps, we'd be pushing the disks to
>>> the
>>> limit, resulting in the highly risky use of some low data rate
>>> disks for
>>> one of the 12-hr high data rate experiments. It would be better to
>>> lower
>>> one of the 12-hr 512 Mbps experiments down to 256 Mbps, or omit it
>>> completely. This is consistent with Steve's initial estimate of 48
>>> hr's
>>> recording at the maximum rate and the remainder of the time at 256
>>> or 128
>>> Mbps. v211a looks like the best candidate for a lower data rate as it
>>> doesn't include Tid.
>>>
>>> The 2 500Gb La Cie disks will be shipped to Hart.
>>>
>>> cheers
>>> Indra
>>>
>>> On Mon, 19 Feb 2007, Jim Lovell wrote:
>>>
>>>>> Hi everyone,
>>>>>
>>>>> Attached is a first attempt at a schedule for the March session.
>>>>> Points to
>>>>> note:
>>>>> * I think this is our first ever disk-only session!
>>>>> * PIs: please let me know if I haven't given you the time range you
>>>>> need.
>>>>> * The pre-experiment fringe-checks are not in there yet. Allow an
>>>>> hour
>>>>> before each experiment.
>>>>> * This assumes existing disks only. It looks to me like there's just
>>>>> enough but it would be appreciated if someone can double-check.
>>>>> I've included
>>>>> times and data rates in the text version of the schedule.
>>>>> * Unfortunately there's not a lot of Tid this time. I'm
>>>>> attempting to
>>>>> scrounge more but am not hopeful.
>>>>> * Jonathan, please note the request for Hart on day 81. Are you
>>>>> free?
>>>>> Can you record Mark5 at 128 Mbps for this one?
>>>>> * John Reynolds: Receiver changes OK with Parkes?
>>>>> * Ceduna: looks like you get to go home early.
>>>>> * There's room for testing on day 82. Any requests?
>>>>>
>>>>> **************************************
>>>>> **** Comments please by Wednesday ****
>>>>> **************************************
>>>>>
>>>>> Cheers,
>>>>> Jim
>>>>>
>>>>>
>

-- 
* * * * * * * * * * * * * * * * * * * * * * * * * *
Assoc. Prof. Steven Tingay
Swinburne SKA Project Leader
Centre for Astrophysics and Supercomputing
Faculty of Information and Communication Technologies
Swinburne University of Technology
Mail H39
P.O. Box 218
Hawthorn, Vic 3122
Australia
Ph     +61 (0)3 9214 8758
Fax    +61 (0)3 9214 8797
Email  stingay_at_astro.<!--nospam-->swin.edu.au
          s.tingay_at_optusnet.<!--nospam-->com.au
          Steven.Tingay_at_gmail.<!--nospam-->com

Received on 2007-02-21 15:56:07