HP HEWC7971A LTO Ultrium 1 Data Tape Cartridge

Name: HP HEWC7971A LTO Ultrium 1 Data Tape Cartridge
Brand: HP
SKU: HEWC7971A

Overview

The HP HEWC7971A is an LTO Ultrium 1 data cartridge rated at 100GB native / 200GB compressed capacity, with a sustained transfer rate of 32MB/s compressed (approximately 15–20MB/s native). These numbers represent the full LTO-1 specification — there is no mid-tier or underspec variant here. The 384-track layout across a half-inch magnetic tape provides the areal density that defines LTO-1, while the embedded cartridge memory (CM) chip stores usage metadata for library management systems. At 1 million total passes, this cartridge is engineered for active rotation schedules, not just shelf storage.

This cartridge is purpose-built for organizations maintaining LTO-1 or LTO-2 drive infrastructure — IT departments with legacy tape libraries that have not yet migrated to LTO-4 or newer, or archival workflows where a large existing pool of LTO-1 media is already in service. It is also read-compatible with LTO-3 drives, giving it a transitional role during infrastructure refreshes. The HEWC7971A is not a consumer product — it belongs in a rack-mounted autoloader or manually managed enterprise backup rotation, where its durability rating and consistent CM chip performance matter most. For anyone still running LTO-1 or LTO-2 hardware, this is the reliable, OEM-spec choice.

Key Features

Readable and writable with LTO-1 and LTO-2 drives; readable with LTO-3 drives

Features a 32MB per second transfer rate; holds up to 384 tracks

Lasts up to 1 million passes which is equal to more than 20,000 end-to-end passes or 260 full tape backups

Specifications

Brand

HP

Model

HEWC7971A

Technology

LTO-1 Ultrium

Native Capacity

100GB

Compressed Capacity

200GB (2:1)

Transfer Rate

32MB/s (compressed)

Tracks

384

Drive Compatibility

Read/Write: LTO-1, LTO-2 | Read Only: LTO-3

Rated Durability

1,000,000 passes / ~260 full backups

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Pros & Cons

👍 Pros

200GB compressed capacity makes it viable for full server backup sets on a single cartridge in LTO-1-era workflows.
Rated for 1 million passes, meaning a full backup rotation schedule of 260 tapes worth of writes before reliability degrades.
LTO-2 and LTO-3 drive compatibility extends the useful life of existing media as infrastructure is upgraded.
384-track layout delivers the full LTO-1 areal density spec with no performance compromise versus the format ceiling.
HP's manufacturing consistency means cartridge memory chip reliability is high, reducing library errors in automated environments.

👎 Cons

LTO-4 and newer drives cannot read LTO-1 media, making long-term migration planning essential before infrastructure upgrades.
32MB/s compressed transfer rate is the LTO-1 ceiling — there is no headroom, and real-world throughput will be lower if the host system cannot stream data continuously.
200GB compressed capacity is modest by modern standards; large datasets require multi-cartridge sets and careful media management.
Native 100GB capacity means heavily compressed data types (media files, pre-compressed archives) will not approach the rated 200GB figure.
No WORM (Write Once, Read Many) variant — this cartridge is rewritable only, so compliance use cases requiring immutable storage need a separate WORM-specific SKU.

Frequently Asked Questions

Which LTO drives are compatible with the HEWC7971A?

LTO-1 cartridges are read/write compatible with LTO-1 and LTO-2 drives, and read-only compatible with LTO-3 drives. LTO-4 and newer drives cannot read LTO-1 media — this is a hard generational limit of the LTO format's two-generation backward compatibility rule.

What is the actual vs. compressed capacity of this cartridge?

The native (uncompressed) capacity of LTO-1 is 100GB; the 200GB figure assumes 2:1 compression. Real-world compressed capacity depends entirely on data compressibility — already-compressed files like ZIPs or JPEGs will land close to 100GB, while uncompressed database dumps or log files can approach or exceed the 200GB figure.

How does the 32MB/s transfer rate affect backup window planning?

At 32MB/s sustained (compressed), a full 200GB tape completes in roughly 104 minutes under ideal conditions. Native throughput is approximately 15–20MB/s. Drive streaming efficiency matters here — if your backup software can't feed data fast enough, the drive will shoe-shine (stop/start repeatedly), reducing effective throughput and accelerating head wear.

How durable is this cartridge for long-term archival rotation?

HP rates the HEWC7971A at 1 million passes — equivalent to over 20,000 end-to-end passes or approximately 260 full tape backups. For archival-only use (write once, rare reads), shelf life under proper storage conditions (cool, dry, away from magnetic fields) can exceed 30 years.

Can I use this cartridge in a tape library or autoloader?

Yes. The HEWC7971A uses the standard LTO Ultrium form factor and includes the cartridge memory (CM) chip required for library bar-code and slot-tracking systems. Verify that your autoloader firmware supports LTO-1 media, as some newer libraries have dropped LTO-1 support entirely.