Folks, the move of pii3 user home directories to the new bigger disk is now complete. The next pii3 disturbance is scheduled for next Tuesday, Feb 20 2001, when pii3 will be moved back to the C.H., it will be put back on the UPS and it's IP address will be changed from 130.199.16.xxx to 130.199.68.xxx. Some background and random thoughts: - the old user disk was not big enough (only 18 Gbytes) - it was mounted internally, with marginal cooling and high exposure to the dirt and filth of our C.H. (hopefully the CH will be cleaner now that the parking lot was paved). - this type of Seagate 18 Gbyte disk has an abnormally high mortality rate, not being the most old, not most numerous, out of 5 recently defunct disks, 4 were of this type (3 E852 disks, 1 opus disk) (the fifth dead disk was the *previous* pii3 user disk, a 9 Gbyte Quantum disk). - the new disks have better cooling in an external enclosure, located high from the ground, away from dirt. - the new filesystem uses two mirrored 36 Gbyte disks. If one of them dies, we do not loose data. - the 36 Gbyte filesystem is the largest we can easily backup to our DLT-7000 tape drive. We could buy bigger disks, but would not be able to reliably back them up. (Mirroring, and other RAIDs, only protects against disk death. They does not help against filesystem corruption, so we still have to make backups). -- Konstantin Olchanski Physics Department, Brookhaven National Laboratory, Long Island, New York olchansk@bnl.gov
This archive was generated by hypermail 2b29 : Tue Feb 13 2001 - 18:49:01 EST