>      We have two detectors running. On each of them, a sophisticated
> trigger logic decides when interesting data has been seen and triggers
> 400 channels of waveform digitizers (like 400 synchronous oscilloscope
> channels). 64 bit of trigger-related meta-data are transmitted to the
> read-out subsystem by the trigger system via the waveform digitizers
> digital input. There are a few hundreds triggers per second. The data
> are collected from 5 VME masters (in 5 VME64x crates) through 1gb/s
> ethernet by a Dell Poweredge server, re-arranged, compressed and written
> to disk before further transmission to a big computer center.
> Compression must be done before writing to avoid saturate the disk
> bandwidth.