[INSTRM-2152] Gen2 is receiving some PFSC files with bad data secition Created: 20/Jan/24  Updated: 03/Feb/24

Status: Open
Project: Instrument control development
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Normal
Reporter: yuki.moritani Assignee: cloomis
Resolution: Unresolved Votes: 0
Labels: EngRun, FITS
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified


 Description   

eric reported that Gen2 is getting some PFSC images whose data section doesn't match up with the size listed in the header. For expample, these files failed to open:

 'PFSC10504800.fits',
 'PFSC10504301.fits',
 'PFSC10505801.fits',
 'PFSC10505300.fits',
 'PFSC10500500.fits',
 'PFSC10504500.fits',
 'PFSC10505501.fits',
 'PFSC10507010.fits',
 'PFSC10506900.fits',
 'PFSC10507008.fits'

 

Craig and Eric compared checksum for an image:

 

cloomis@shell-ics:raw$ sha256sum 2024-01-17/mcs/PFSC10507008.fits
51307b99c4c2c5e37407d8fa51419aa100c0c5a761e4613047760ee20ee9953a 2024-01-17/mcs/PFSC10507008.fits

vs

gen2@g2s2:/gen2/share/data/PFS$ sha256sum PFSC10507008.fits
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  PFSC10507008.fits

 Comments   
Comment by eric [ 02/Feb/24 ]

I suspect INSTRM-1425 is a possible reason we are receiving bad frames occasionally. Is it now the case that the process writing the file is no longer the one sending the request to transfer it?  (That or possibly INSTRM-2105 ?)

STARS transfer for PFSC frames is already disabled, so this is not a big issue at the moment.

Comment by cloomis [ 03/Feb/24 ]

Clearly INSTRM-1425/INSTRM-1385 is the issue. Chi-Hung and I chatted at some point about using the fancier/more complicated ics_utils fitsWriter module which PFSB are written are written with, which among other things handles exactly this issue. We need to decide whether that is necessary, or the right thing to do.

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