1. Status of LHCb PC Farm prototype
Content
PC rack configuration
Powering tests
Outlook (short term)
16/06/2004
Ph.Gavillet CERN/PH-LBC

2. Ph.Gavillet CERN/PH-LBC
PC rack configuration
2 * Subfarm / 59U rack
Each rack
1 * rackcooler CIAT
1 elec. Dist. box (1phase :63A)
1 * 48-port Control switch
Each Subfarm
3 * 9-outlet reglettes (16A)
23 * PCs
1 * 24-port Data switch
Currently
39 ( ) PCs
16/06/2004
Ph.Gavillet CERN/PH-LBC

3. PC rack: current configuration
16/06/2004
Ph.Gavillet CERN/PH-LBC

4. Ph.Gavillet CERN/PH-LBC
Powering tests (12/05)
TS-EL (J.Pierlot, F.Courajoud)
Test 1: 3-phase supply, 3 departs
3 departs (R,S,T ) supplying 3 reglettes (10A, 19 outlets)
One (25A, C-curve) circuit breaker / depart
3 (off/on spaced by ~ 20s) every ~4 mins
Powering OK (Full PC-rack booting in ~ 4 mins)
Test2: 1-phase supply, 3 departs
3 departs (on 1 phase) as for Test 1
5 (off/on spaced by ~ 20s)) every ~4 mins
Powering OK
Test3: 1-phase supply, 6 departs
6 departs supplying one reglette each (10A, 9 outlets)
One (16A, C-curve) circuit breaker / depart
5*off/on every ~ 20s, 3*off/on spaced by <1s) every ~ min
16/06/2004
Ph.Gavillet CERN/PH-LBC

5. Ph.Gavillet CERN/PH-LBC
Outlook (short term)
Complete 2nd Subfarm configuration
Last PCs to be delivered on week 25
Installation completed by end of week 26
Powering test on full configuration
Repeat On/Off tests
Work out reglettes characteristics
Circuit breakers (type, Amp)
Conclude on single rack powering
Repeat detailed LV measurements (K.Kahle et al.)
Inrush currents
Harmonic distortion
Repeat cooling measurements on full configuration
Power in / Power out balance
Map of temperatures: In / behind PCs / Out
Start investigating cooling of switches
16/06/2004
Ph.Gavillet CERN/PH-LBC