Seagate 80gb Barracuda

Seagate Barracuda is a hard disk drive series most of which operate at a spindle speed of 7200 RPM. They are produced by Seagate Technology. Depending on the family they are targeted to desktop/offline or enterprise/nearline applications using various interfaces.

Barracuda

ATA

This is the first barracuda family using the ATA interface. Their capacity ranges from 6,8 GB to 28,5 GB. They support ATA 66 and their buffer size is 0,5 MB.

ATA II (100)

Their capacity ranges from 10,2 GB to 30,6 GB. They support ATA 66 (100) and their buffer size is 2 MB.

ATA III

Their capacity ranges from 10,2 GB to 40 GB. They support ATA 100 and their buffer size is 2 MB.

ATA IV

Their capacity ranges from 20 GB to 80 GB. They support ATA 100 and their buffer size is 2 MB.

These disks cannot operate reliably at ATA 100 on RCC/ServerWorks IDE controllers. The drivers of these controllers blacklist the disks and limit their operation to ATA 66.

(S)ATA V (Plus)

This is the first barracuda family using the SATA interface. Their capacity ranges from 40 GB to 120 GB. They support ATA 100 or SATA and their buffer size is 8 MB.

The SATA models have many problems including random data loss (such as disappearing partitions). These disks cannot work with some Silicon Image SATA controllers. The drivers of these controllers blacklist the disks and limit the maximum sectors of each transaction below 8KB (15 sectors). That workaround has a large performance impact.

7200.7 (Plus)

Their capacity ranges from 40 GB to 200 GB. They support ATA 100 or SATA. Their buffer size is 2 MB or 8 MB depending on the disk model.

The NCQ capable SATA models do not have NCQ even though their product manual and firmware claim to support it.

7200.8

Their capacity ranges from 200 GB to 400 GB. They support ATA 100 or SATA with NCQ. Their buffer size is 8 MB or 16MB depending on the disk model.

7200.9

Their capacity ranges from 40 GB to 500 GB. They support ATA 100 or SATA 3Gb/s. Their buffer size is 2 MB or 8 MB depending on the disk model and its interface.

7200.10

This is the first seagate product family that supports perpendicular recording. Their capacity ranges from 80 GB to 750 GB. They support ATA 100 or SATA 3Gb/s. Their buffer size is 2 MB, 8 MB or 16MB depending on the disk model and its interface.

The SATA models of this family with firmware 3.AAK or older (e.g. 3.AAE) have introduced a firmware (microcode) bug:

• There is a performance anomaly using hdparm with NCQ queue depth 31 in AHCI mode. Speed test measures only 55~64 MB/s (expected: >70~75MB/s).

Seagate does not officially provide firmware updates for this issue.

Despite that, unofficial firmware updates exist for ST3320820AS with P/N 9BJ13G-308, ST3320620AS with P/N 9BJ14G-308 (3.AAK), ST3500830AS with P/N 9BJ136-308 and ST3500630AS with P/N 9BJ146-308.These update the firmware to 3.AAM and solve the bug.

7200.11

Their capacity ranges from 160 GB to 1,5 TB. They support SATA 3Gb/s only. Codenames are Moose (earlier revision) and Brinks (later revision). Their buffer size is 8 MB, 16MB or 32MB.

This family has introduced many firmware (microcode) bugs:

• Disks may not show and utilize all the cache.
• FLUSH_CACHE commands may timeout when NCQ is used.
• There is a performance anomaly using hdparm with NCQ queue depth 31 in AHCI mode. Speed test measures only 45~50 MB/s (expected: >100~110 MB/s).
• Disks may be inaccessible at power on.

Disks affected by the last bug will not be detected in the Computer BIOS after a reboot. Numerous users have complained of this and are discussing it in a public forum when discussions in the Seagate forums were subjected to heavy moderation and subsequently closed. The symptom of the problem is that the Computer BIOS will no longer detect the hard disk after a reboot, and upon connecting to the hard disk with a Serial TTL board, this error code will be seen "LED:000000CC FAddr:0024A051". Faulty firmware triggers this 'failure', and the hard disk 'disappearances' seem to be happening in the month of November, December 2008 and 2009 and still going on as reported in the forums. Seagate Freeagent external drives also utilize 7200.11 harddisks with SDxx firmware and people have reported failures of theses drives as well. The LED remains permanently on even after a USB disconnect and the drive is no longer detected. Seagate though says they are unaffected, so only opening of the case reveals the truth. Two companies have claimed to be able to resolve this problem using their solution, namely Ace Laboratory PC3000-UDMA (version 4.13) and Salvation Data HD Doctor for Seagate (version 3.0) .

In order to fix the first bug, Seagate released a firmware update (version AD14) for the affected disk models. In order to fix the second, third and fourth bug, Seagate released firmware updates (version SD1A, SD1B, SD2B,SD81) for the affected disk models. Owners that have already updated their disks to AD14 have to repeat the process one more time with the latest firmware (version SD1A)!

The SD2B firmware update for Brinks silently removes the DCO ATA feature from the disks while SD1A for Moose adds two ATA features.

7200.12

Their capacity ranges from 160 GB to 1 TB. They support SATA 3Gb/s only. Their buffer size is 8 MB, 16 MB or 32 MB.

Barracuda ES

ES

This is the first member of the ES family. Their capacity ranges from 250 GB to 750 GB. They support SATA 3Gb/s. Their buffer size is 8 MB or 16 MB. The performance (and probably the design) is similar to the 7200.10

ES.2

Their capacity ranges from 500 GB to 1 TB. They support SATA 3Gb/s or SAS. Their buffer size is 16 MB for SAS models and 32 MB for SATA models. The performance (and probably the design) is similar to the 7200.11.

Similar to the 7200.11 family, this family has introduced many firmware (microcode) bugs:

• RAID arrays using these disks may fail.
• Secure Erase command is not handled properly.
• There is a performance anomaly using hdparm with NCQ queue depth 31 in AHCI mode. Speed test measures only 50 MB/s (expected: >100MB/s).
• Disks may be inaccessible at power on.

Barracuda LP

This is the first family that operates at a spindle speed of 5900 RPM. Their capacity ranges from 500 GB to 2 TB. They support SATA 3Gb/s and their buffer size is 32 MB.

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