topic Re: Drive Enclosure in Disk Enclosures

Drive Enclosure

Feljav — Thu, 28 Jun 2007 11:23:01 GMT

What is the meaning of E-PBC in an enclosure?
What is the meaning of the RoHS?

Re: Drive Enclosure

Rob Leadbeater — Thu, 28 Jun 2007 12:12:14 GMT

Hi,

I take it you know how to use Google...!

RoHS:
Restriction of Hazardous Substances
http://www.rohs.gov.uk/

A European Directive restricting the sale/movemenent of electronic/electrical goods with more than agreed levels of certain harmful chemicals (lead, cadmium etc.)

E-PBC:
Would appear to be a similar Australian directive.
http://www.environment.gov.au/epbc/index.html

When used in relation to a drive enclosure, it probably just means that the components conform to these directives.

Hope this helps,

Regards,

Rob

Re: Drive Enclosure

Mark... — Tue, 03 Jul 2007 04:44:30 GMT

Hi,
Rohs- yes that is correct,
E-PBC - sorry no nothing to do with hazourdous substances.
E-PBC = Enhanced Port Bypass Chip. You find this on Rev E I/O modules for EVA shelves. You must use these for the second generation EVA products [4/6/8k] but they can be used in the first generation as well. They have a new chip built into them that monitors the bus for errors. When these errors/thresholds are reached then the I/O module will port bypass the failing drive. Makes the backend loops more reliable for "mapping" out failed drives as opposed to the drives mapping themselves should they fail. You do not require an SFP in the bottom port if they are used in a switched config - REV D/C modules require SFP's installed even if not used.
That's about it really.

Mark...