Note that /fb0_frames will be going down unannounced several times over the next few weeks, and then all the data will be unavailable for several days the last week of this month, when we replace almost all the RAID systems here. There will be major framebuilder upgrades continuing after that through the month of July.

However, /archive should be up, except the last week of this month, June. The data may not be up-to-the minute here, but at least something should be available...

Hi All,

The /archive, /frames, and /export filesystems will be updated next week,
Monday June 23 - Friday June 27, 2008, at LHO. Since most LDAS services
require one or more of these filesystems, all LDAS services will go down
starting Monday afternoon. We will also try to take advantage of the
downtime to patch, update, and install new servers. Thus, the downtime could
last most of the week.

During this downtime CDS will also be upgrading the fb1 framebuilder. The
/frames filesystem will remain unavailable until CDS completes this work.

All astrowatch data will be written by the fb0 framebuilder during the
LDAS/CDS downtime, and LDAS will catch up with archiving this data as soon
as possible during the week, so that no astrowatch data should be lost. Our
next priority after this will be to restore the services needed by the
cluster, and open it back up for jobs.

Announcements will be made when services are restored.

Thanks for your patience.

Regards,
Greg

Science Update

**Substantial changes to the H1 and L1 (Louisiana) interferometers
continue to occur week by week in the Enhanced LIGO program. LIGO
personnel recently said farewell to the 10-watt Nd:YAG Lightwave
laser that provided light into the detector for nearly 10 years. In
its place there now rests a 35-watt unit developed by the Albert
Einstein Institute and Lazer Zentrum Hannover. The power increase
will render the interferometer more sensitive. The seed laser and
the amplification system will form the basis of the Advanced LIGO
laser, with additional amplification bringing the power up to nearly
200 watts for Advanced LIGO. To fully exploit the sensitivity gains
from higher power, these new systems must conform to LIGO's
extraordinary requirements for the stability of the light. In 2006
the AEI-LZH team achieved and published worldwide best results for
laser power stabilization on the hardware design that now resides at
LHO.

Hi All,

The upgrade of /export, /archive, and /frames has been completed at LHO.

However, we are still working to get the segment database up (Ping and
Duncan are helping).

Currrently unvailable: condor, publishing of raw astrowatch data and segments, and LSCsegFind; logins to ldas-grid are currently disabled.

Logins to ldas-pcdev1 at LHO are available again. LSCdataFind should work.

Archiving and reduction of trend and astrowatch data began again yesterday, and is catching up. Publishing of trend and astrowatch Level 1 and 3 RDS data is running, and this data has begun to transfer to CIT.

Note that the /frames directory will not be available until CDS
completes its tests of the new framebuilder using this filesystem,
sometime after July 4.

Thanks for your patience.

Regards,
Greg

But I don't know for sure yet if there will be gaps in available data or not.