zx said:
They still put mainframes (and servers) in their own rooms today... Last summer, I had a server rack beside my desk for testing. Those were dual PII and PIII series with 10K and 7.2K SCSI disks. The main source of noise was the case fans. The noise level was very high. I did not mind that much, since I was not always in my office.
Data center rooms are a good idea for a lot of reasons. With enough machines you need cooling all year around, including winter, so a dedicated room lets you control the environment (temp & humidity) without affecting your employee environment. Locked doors and firewalls enhance physical security. Easier to dedicate a UPS to a data center vs. lots of machines all over the place. Concentrates LAN equipment. Enables the use of electronics-safe, but not necessarily human-safe, fire suppression techniques (Halon in the old days). Cabling can be more organized with a raised floor. Vibration is isolated.
And the noise. Our data center has quite a bit of background noise and it's hard to truly isolate any major contributor. 3 HVAC units, 2 large UPSes, 100+ Wintel servers (many dual-processor), 1 AS/400, routers and other networking gear, corporate phone system, etc. Across those servers there will be hundreds, if not 1000+ hard drives. All SCSI, most 10K.
- Fushigi