Dell

Dell Seagate 49RKR Cheetah X15 18GB 15K SCSI Hard Drive

Name: Dell Seagate 49RKR Cheetah X15 18GB 15K SCSI Hard Drive
Brand: Dell
SKU: 49RKR
Rating: 5 (1 reviews)

MPN: 49RKR·By: Dell

Part #:49RKRNewIn stock

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Product overview

The Seagate Cheetah X15 ST318451LW is an enterprise-class SCSI hard drive designed for demanding storage applications. It provides 18GB capacity with a high spin rate of 15,000 RPM, enabling rapid data access. The drive features an Ultra 160 SCSI interface for reliable connectivity in legacy systems. Key performance metrics include a data rate of 508 Mbit/sec and an average seek time of 4.1ms. It utilizes a 4MB buffer to optimize data transfer efficiency. The ST318451LW model employs 6 heads across multiple platters in a 1/3 height form factor, supporting PRML read channel and GMR head technology. This configuration suits environments requiring consistent performance from SCSI-compatible infrastructure. Backward compatibility with SCSI-1 and SCSI-2 ensures integration with older host adapters. Physical dimensions align with standard 3.5-inch enterprise drives, facilitating deployment in rack-mounted servers and storage arrays focused on low-latency operations.

15,000 RPM spindle speed for low-latency access
4.1ms average seek time
Ultra 160 SCSI interface, SCSI-1/2 compatible
18GB capacity, 6 heads
508 Mbit/sec data rate
4MB buffer, PRML read channel

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	49RKR
Brand	Dell
Condition	New
Model	ST318451LW
Capacity	18 GB
Head Count	10 heads
Data Buffer	4096 kbytes
Form Factor	3.5 inch LFF
Cache Buffer	Programmable multi-segmentable cache buffer
Cache Memory	8 MB
Drive Height	1/3 height
Product Line	Seagate Cheetah X15
Product Type	Internal Hard Drive
SCSI Drivers	Multimode SCSI drivers and receivers, single-ended and low voltage differential
Actuator Type	Balanced low mass rotary voice coil
SCSI Standard	Ultra-160
Spindle Brake	Dynamic spindle brake
Spindle Speed	15000 RPM
Command Queuing	up to 64 commands
Head Technology	GMR
SCSI Controller	Integrated Ultra160 SCSI controller
Mounting Options	Vertical, horizontal, or top down
Platter Capacity	1.8 GB
Self Diagnostics	Performed when power is applied to the drive
I/O Data Bus Width	16 bit
Sector Reallocation	Programmable sector reallocation scheme with flawed sector reallocation at format time
Recording Technology	Zoned bit recording
Monitoring Technology	Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)
Backward Compatibility	Operates at SCSI-1 and SCSI-2 data transfer rates
Hot Plug Compatibility	Supported for LC model drives
Read Channel Technology	PRML
Selectable Sector Sizes	512 to 2064 bytes per sector

Performance

MTBF	1,200,000 hours
Seek Time	4.1 ms
Average Latency	2.0 ms
Data Transfer Rate	160 MB/s
Maximum Data Transfer Rate	160 MB/s

Networking Ports & Interfaces

Connector Type	68-pin HD68
Interface Type	SCSI
SCSI Connector	68-pin HD68
Data Transfer Protocol	Asynchronous and synchronous data transfer protocol
SCSI Interface Standard	SCSI LVD U160

Compatible systems

Legacy enterprise SCSI drive; compatible with Dell PowerEdge servers and systems with Ultra-160 SCSI controllers

Dell PowerEdge
Model: Various enterprise servers
Form factor: 3.5 inch internal bay
Generation: Legacy (1990s-2000s)
49RKR is a Dell-branded SKU for Seagate Cheetah X15; compatible with Dell PowerEdge servers with SCSI controllers from that era

Best for

High-Performance Servers
Supports 15,000 RPM spin rate and 4.1ms seek time for rapid data access in server environments requiring low latency.
Legacy SCSI Systems
Ultra 160 SCSI interface with backward compatibility to SCSI-1 and SCSI-2 enables integration into existing infrastructure.
Enterprise Storage Arrays
18GB capacity and 4MB buffer provide reliable storage in rack systems using SCSI connectivity.
Database Applications
508 Mbit/sec data rate and PRML read channel deliver consistent throughput for transaction-heavy workloads.

Frequently asked questions

What is the spindle speed of the Seagate Cheetah X15 ST318451LW?

The drive spins at 15,000 RPM, providing high rotational performance for enterprise applications. This speed supports rapid data access across its 18GB capacity, as specified for Cheetah X15 models.

What interface does this hard drive use?

It features an Ultra 160 SCSI interface with backward compatibility to SCSI-1 and SCSI-2 standards. This enables integration with legacy systems while supporting data rates up to 508 Mbit/sec.

What is the seek time performance?

The average seek time is 4.1ms, achieved with 6 heads and GMR technology in the ST318451LW model. This low latency benefits random access workloads in 1/3 height enterprise drives.

What is the buffer size?

The drive includes a 4MB buffer to enhance data transfer efficiency. Combined with PRML read channel, it optimizes performance for the 15,000 RPM operation and 18GB storage.

What is the data transfer rate?

It delivers a data rate of 508 Mbit/sec via the Ultra 160 SCSI interface. This sustains throughput in multi-drive arrays, supported by the 4MB buffer and high RPM design.

Details

Shipping, warranty & returns

Customer reviews

5.0(1 review)

Great
Yes it did well work for us, wa slike brand new thanks
Rab· Jul 1, 2026

Dell Hard Drives 3.5-inch (LFF) Server Hard Drives 15K RPM Enterprise Hard Drives Dell PowerEdge Drives (OEM + Caddy)

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Manufacturer part #

49RKR

Brand

Dell

Condition

New

Model

ST318451LW

Capacity

18 GB

Head Count

10 heads

Data Buffer

4096 kbytes

Form Factor

3.5 inch LFF

Cache Buffer

Programmable multi-segmentable cache buffer

Cache Memory

8 MB

Drive Height

1/3 height

Product Line

Seagate Cheetah X15

Product Type

Internal Hard Drive

SCSI Drivers

Multimode SCSI drivers and receivers, single-ended and low voltage differential

Actuator Type

Balanced low mass rotary voice coil

SCSI Standard

Ultra-160

Spindle Brake

Dynamic spindle brake

Spindle Speed

15000 RPM

Command Queuing

up to 64 commands

Head Technology

GMR

SCSI Controller

Integrated Ultra160 SCSI controller

Mounting Options

Vertical, horizontal, or top down

Platter Capacity

1.8 GB

Self Diagnostics

Performed when power is applied to the drive

I/O Data Bus Width

16 bit

Sector Reallocation

Programmable sector reallocation scheme with flawed sector reallocation at format time

Recording Technology

Zoned bit recording

Monitoring Technology

Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)

Backward Compatibility

Operates at SCSI-1 and SCSI-2 data transfer rates

Hot Plug Compatibility

Supported for LC model drives

Read Channel Technology

PRML

Selectable Sector Sizes

512 to 2064 bytes per sector

MTBF

1,200,000 hours

Seek Time

4.1 ms

Average Latency

2.0 ms

Data Transfer Rate

160 MB/s

Maximum Data Transfer Rate

160 MB/s

Connector Type

68-pin HD68

Interface Type

SCSI

SCSI Connector

68-pin HD68

Data Transfer Protocol

Asynchronous and synchronous data transfer protocol

SCSI Interface Standard

SCSI LVD U160

Dell Seagate 49RKR Cheetah X15 18GB 15K SCSI Hard Drive

Product overview

Featuring

Performance

Networking Ports & Interfaces

Compatible systems

Best for

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

Shop these collections

Dell Seagate 49RKR Cheetah X15 18GB 15K SCSI Hard Drive

Product overview

Featuring

Performance

Networking Ports & Interfaces

Compatible systems

Best for

Frequently asked questions

Details

Shipping, warranty & returns

Customer reviews

Shop these collections