More hardware maintenance this week

[andrewvs...@gmail.com]

Due to an MIT network upgrade the LMFDB development machine legendre.mit.edu will be offine for 5 minutes at 5 pm Eastern time on Tuesday September 22.  this will not impact www.lmfdb.org or beta.lmfdb.org.

On a separate note, if the replacement disks arrive in time we plan to install them on grace on Friday around 4pm, which will bring down beta.lmfdb.org for about 10 minutes.  I will post again if/when this is confirmed.