Specific Characteristics Of Zcr Controllers - Adaptec SCSI RAID 2010S Installation Manual

Specific Characteristics of ZCR Controllers

ZCR controllers perform the same functions as add-in RAID
controller cards, but Adaptec's ZCR controllers can only be used in
motherboards that support EMRL or RAIDIOS logic and on-board
Adaptec Ultra320 SCSI Protocol Chips (SPC). When a ZCR is not
installed, EMRL logic is not active, letting the SPC function as a
SCSI adapter only.
Note: Neither the ASR-2010S or the ASR-2015S will function
when used with motherboards having embedded Adaptec
7899W or 7892 U160 SCSI chips. Use ASR-2000S or ASR-2005S
controllers for those motherboards using U160 SCSI chips.
Data stored on any individual SCSI hard disk drive must be
backed-up prior to installing a ZCR. Once installed, the ZCR hides
the normal SCSI BIOS and replaces it with an I
SMOR.
To meet the space constraints of the high-density servers and the
flexibility required for the pedestal servers, EMRL is designed to
support two form factors. One is a PCI add-in card and the other is
a daughter card designed to attach to a motherboard connector.
Functionally the PCI add-in card and the SO-DIMM card are
identical. The primary difference is the form factor of the two cards.
Pedestal Server Form Factor Implementation
The Adaptec PCI-based ZCR controller (2010S) is packaged in a
low profile PCI form factor, targeting the 1U and 2U server market
using a discrete I/O controller on the motherboard. This
implementation is intended to be used in the more generic pedestal
server designs.
The 2010S requires EMRL or RAIDIOS on the motherboard to
allow the Input/Output Controller (IOC) to function normally
when the ZCR controller is not installed, but be hidden and
controlled only by the ZCR controller Input/Output Processor
(IOP) when the Adaptec PCI-based ZCR controller is installed.
Introduction
O RAID BIOS and
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