Seagate Exos 4U User manual

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Exos® 4U Enclosure Rackmount Guide
Part Number 83-00007769-10-01, D • December 2021
Complete installation prerequisites
The rackmount rails are designed to bear the maximum weight of the storage enclosure when it is properly mounted in a
standard rack cabinet. You can install multiple storage enclosures in a single rack cabinet.
CAUTION You must use only the supplied rail kit and related mounting hardware.
To complete installation prerequisites:
1. Prepare the host system for the installation by obtaining access to the following items:
a. A functioning host bus adapter
b. Known good cables for host connection that meet storage enclosure requirements
c. The provided right-angle power cords that meet power supply unit specifications
2. Familiarize yourself with system configuration requirements and the layout of storage enclosure modules.
3. Obtain the following:
a. An anti-static wrist or ankle strap for handling static-sensitive components
b. A static-protected environment for temporary storage of the storage enclosure and the drive modules
c. A T10 screwdriver, 6-in length, and #2 Phillips-head magnetic screwdrivers, 6- and 12-in length
d. A retractable tape measure
e. A mechanical lift with sufficient clearance and capable of safely lifting the storage enclosure without drive modules
4. Ensure the rack cabinet is suitable for use with the storage enclosure.
a. A rack cabinet capable of holding 4U form factors, leveled in all planes with respect to each other
b. A maximum depth of 43.35 inches (1101mm) from back of front post to maximum extremity, excluding cabling and door
closure considerations
c. A rack cabinet that causes a maximum back air pressure of 5 pascals (0.5mm water gauge)
d. Weight capacity for the total number of storage enclosures installed, using a maximum of 310 lb (140kg) per storage
enclosure
NOTE Allocate and maintain a 1.7m or 5.58 ft safe distance to mount or remove a storage enclosure into a rack.
5. Secure sufficient staff to assist with the installation. Minimum staff:
a. One qualified service technician for the complete installation procedure
b. One spotter to assist with the lift and to observe the installation from the rear of the rack cabinet
c. A total of two to four people to unpack the storage enclosure and move it onto the mechanical lift

Install the rackmount rail kit
The storage enclosure requires rackmount hardware for installation into a standard 1.2m rack and occupies four EIA units of
rack space (17.78 cm or 7 inches) per unit. The rail kit contains a left and right rail. Product function and user safety hinge on
their proper installation.
NOTE Allocate and maintain a 1.7m or 5.58 ft safe distance to mount or remove a storage enclosure into a rack.
Separate the inner rails from the outer and mid rails
The rails ship with an inner rail inside each of the outer and mid rail sub-assemblies. You must separate them before attaching
outer and mid rail sub-assemblies to the rack cabinet and inner rails to the storage enclosure.
1 2 3 64 5
7 8 9 10
Item Description Item Description
1 Front mount bracket 6 End cap
2 Outer rail 7 Slotted screw holes
3 Ball bearing retainer 8 T-pin keyholes
4 Rear mount bracket 9 Safety lock
5 Mid rail, slides within outer rail 10 Inner rail
Figure 1 Separated left rail assembly, inner sides facing
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To separate the inner rails from the outer and mid rail sub-assemblies:
1. After removing each rail assembly from its packaging, orient the one with the L embossed on it to your left, the rail
assembly with the R embossed on it to your right, and embossed arrows for both pointing up.
2. Examine the rails to distinguish each component, particularly the ball bearing retainer and mid rail.
WARNING! Carefully inspect the rails. Do not use damaged or warped rails. Return them. Rail failure can allow the
storage enclosure to fall and result in serious injury since the load on them can exceed 300 lb (136 kg).
3. (Optional) Clip an end cap into the slots at the rear outer side of each rail, locking it in place.
4. Extend the mid and inner rail on the outer rail of the left rail assembly until the safety lock engages with a click.
Figure 2 Extension of left inner rail beyond mid rail
5. Turn the left rail assembly over, then press the safety lock to disengage the inner rail.
Figure 3 Location of inner rail safety lock
6. Slide out the left inner rail until it separates from the outer rail subassembly, setting it aside.
7. Turn the left outer rail subassembly back over, then locate the mid rail release switch.

Figure 4 Location of mid rail release switch lever
8. Rotate the mid rail release switch lever to release it, then slide the left mid rail back until fully retracted onto the outer rail.
9. Set aside the left outer rail subassembly near the left inner rail.
10. Separate the right rail using the same process, keeping the separated right rails in an alternate location as the mirror image
of the separated left rails.
11. Inspect the rails once again for any damage or warping. If you locate either, return them in their shipping carton.
Adjust the outer rails to the rack cabinet
You must correctly attach the outer rails to the rack cabinet. After successful installation, the storage enclosure must slide
smoothly on the rails from fully inserted, out to the service position, and back again.
Required equipment Qty Identification
Outer rails, properly oriented 2 N/A
A retractable tape measure 1 N/A
#2 Phillips-head screwdriver, 6-in length 1 N/A
Panhead screw, M4x4mm length 4
CMA B bracket 1
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To adjust the outer rails to the rack cabinet:
1. Facing the left side of the rack cabinet, measure the distance of the post-to-post depth between the inner side of the rear
and front rack posts.
Figure 5 Distance measurement of rack inside post-to-post depth
2. Select the left outer rail assembly, rotating it so you face the mid rail and the outer rail is facing away from you.
3. Rotate the mid rail release switch lever, then extend the mid rail until it locks.
4. If the distance you measured is not between the default 34 and 35 inches, use a #2 Phillips-head screwdriver to remove
and set aside all four rear mount bracket setscrews.
Figure 6 Default location of outer rail adjustment setscrews

5. Measure the rail distance from the inside of the front mount bracket to inside of the back mount bracket to determine if it
matches the distance between rack posts.
Figure 7 Measurement of rail from rear to front mount bracket
6. If the distance does not match, relocate the rear mount bracket to within an inch of the post-to-post depth distance you
recorded and align the rear mount bracket holes to the demarked holes on the outer rail. For example, if you recorded 27.5
inches, you would use the 27- and 28-inch holes marked on the rails.
Figure 8 Sample adjusted distance for outer rail setscrews
7. Insert and tighten each setscrew with a #2 Phillips-head screwdriver to a torque of 12 lbf-in (1.36 N-m), then perform a fit
check to validate the correct rail length.
8. Repeat the process for the right outer rail, using the proper orientation for the rack cabinet and rail.
9. Turn over the right outer rail assembly to access the inner side of the rear outer rail, then locate the CMA B bracket
attachment holes.
IMPORTANT Orient the rail with the bracket front to your right, the rounded rear of the bracket to your left, and the
outer rail away from you.
10. Select the CMA B bracket from the CMA box.
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11. Attach the CMA B bracket with the proper orientation to the right outer rail using four (4) M4 Panhead screws, tightening
with a #2 Phillips-head screwdriver to a torque of 18 lbf-in (2.0 N-m).
Figure 9 Alignment of CMA B bracket to rear outer rail bracket holes alignment and attachment
Install the outer rails in the rack cabinet
WARNING! If you do not properly install and securely fasten the rack rails according to this procedure, you risk serious
personal injury and could damage the storage enclosure.
Attach the outer rack rails in 4U increments. Select the location for the outer rails based on the following factors:
lRack system safety precautions
lPosition in the rack
lPopulation of the storage enclosure, full or partial
Once you determine the appropriate position in the rack cabinet, reread the rack system safety precautions, then proceed to
install the outer rails. The following task assumes your rack posts have square mounting holes.
Required equipment Qty Identification
Outer rails, properly oriented 2 N/A
#2 Phillips-head screwdriver, 12-in length 1 N/A
Truss head screws, 10-32x3/4 in length 10
Cage nut, 10-32 for rack posts with square mounting holes 2:4

To install the outer rails in the rack cabinet:
1. Verify that you assembled the rack rails according to prior tasks, orienting it with embossed arrows pointing upward.
2. Complete the following actions to insert the right outer rail assembly as shown to attach it to the rear post on the right side
of the rack cabinet:
a. Insert the right outer rail assembly, adjusting the rear mount bracket to the bottom of the allotted 4U space.
b. Clip the rear mount bracket spring onto the rear rack post, then confirm that the rear mount bracket seats fully in the
rear rack post mounting holes.
c. Secure the rear rack rail flange to the rack column with two (2) Truss head screws, then tighten each screw with a #2
Phillips-head screwdriver to a torque of 35 lbf-in (3.95 N-m).
Figure 10 Attach the rear of the outer right rail assembly
d. (Optional) To release the rear mount bracket, press the release lever with the PUSH label and realign the rail.
3. Complete the following actions to attach the front of the right outer rail assembly to the right front post of the rack
cabinet:
a. Slide the front mount bracket into the front rack post so that it occupies the bottom of the allotted 4U space and it
aligns with the rear mount bracket.
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b. Clip the front mount bracket spring onto the front rack post so that the outer sleeve, which mates to either a round or
square mounting hole, snaps fully into place.
c. Confirm that the mounting bracket fully seats in the mounting holes by verifying that the outer sleeve fully extends
and is flush with the fixed inner pin.
d. Confirm that the keyed latch on the front mount bracket snaps onto the front rack post.
e. (Optional) To release the front mount bracket, press the keyed latch outward and realign the rail.
f. Insert a Truss head screw in the hole just below the bottom rail pin seated in the rack post.
Figure 11 Right front post detail of the inserted outer right rail assembly
g. Secure the front mount bracket by tightening the screw with a #2 Phillips-head screwdriver to a torque of 35 lbf-in
(3.95 N-m).
4. Complete the following actions to insert cage nuts in the right front rack post:
a. Insert a cage nut in each front rack post at the second-from-the-top hole in the allocated 4U space, then make sure the
nut spring is fully engaged in the post hole.

b. (Optional) Insert a cage nut in the front rack post just below it in the allocated 4U space, then make sure the nut spring
is fully engaged in the post hole. Reserve this cage nut for use during non-operating transport of the storage enclosure.
Figure 12 Location for cage nut near top of allocated 4U space
5. Repeat the entire procedure for the left outer rail assembly and the perform a fit check to validate each rail's correct length
and location within the rack cabinet.
Attach the inner rails to the storage enclosure
You must correctly attach the inner rails to the storage enclosure to bear the weight of its contents.
Required equipment Qty Identification
Inner rails, properly oriented 2 N/A
T10 Torx screwdriver, 6-in length 1 N/A
M3 low profile screws, 5x2.75-in length 10
#2 Phillips-head screwdriver, 6-in length 1 N/A
Panhead screw, M4x4mm length 2
CMA A bracket 1
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