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Part Number 8519184-0000 Rev: B
General Information
Congratulations on your choice of a Trimm Technologies Enclosure. The UR8J series of enclosures are
intended for rack-mounted applications. The UT8J series of enclosures are tower types for desktop
(deskside) applications. Both types of enclosures support up to eight (8) 3.5” SCSI hard drives. The drives
are to be mounted in drive canisters (modules), which accommodate standard or low profile SCA-2 style
drives. The enclosure provides power and cooling for up to eight drives of the 10,000 RPM class of hard
drives. The canister has been designed to accommodate the rotational characteristics of the 10,000 RPM
category of drives, while providing for fully seating the drive’s connector into the enclosure’s backplane.
Description
The enclosure (chassis) has been designed for Field Replaceable Units (FRU’s) to be interchangeable
between the different units within the family. The enclosure is a midplane (backplane) design with dual
redundant (N+1), hot pluggable power supplies and redundant (N+1) cooling. Likewise, the drive
canisters are hot-pluggable, plugging in from the front of the enclosure.
While the design has a mid-plane, no active components are on the mid-plane. All active components are
on/in pluggable FRU’s, which are accessible either from the front or rear of the enclosure. The N+1
design, along with the pluggable FRU’s provides for maximum uptime.
The drives, accommodated by this family of enclosures, are those that conform to SCSI-3 specifications
with SCA-2 connections. The single-ended and host only low-voltage differential (LVD) versions support
drives up through SCSI-3 Fast 20 (Ultra) for transfer rates up to 40 MB/s, while the LVD native (Host
and Drive) supports SCSI-3 Ultra 2 transfer rates up to 80 MB/s.
The drives must meet the SCSI specifications for bus loading to work properly in an Ultra SCSI
environment. The drive must mechanically comply with the Small Form Factor (SFF) committee (SCSI
working committee) dimensional specifications for SCA drives (or in the alternate, Seagate dimensional
specifications for SCA drives).
Each drive is mounted into a canister (module) and is attached from the bottom. The drive is mounted in
the canister such that the drive connector is fully seated in the midplane (backplane) when the canister
handle is closed and latched into the enclosure. Noting that the drive canister is hot-pluggable, the drive is
not spun down prior to unplugging. To remove a drive, the canister handle is opened (released) from its
latch. Opening the handle on the canister disengages the drive’s connector from the enclosure’s
connector, thereby removing power from the drive, which will then permit the drive to spin down. The
person removing the drive should wait at least ten (10) seconds after opening the handle, for the drive to
spin down, before removing the canister from the enclosure.
First - Unpack, Inspect and Check:
Unpack the enclosure and visually inspect it for damage that may have occurred during shipment. Retain
the shipping carton in case reshipment is necessary.
Check your Drive Manual for inspection, installation and setup information.
