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HDD mini-reviews

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HDD mini-reviews – part 10

Postby LongRunner » January 29th, 2025, 11:44 pm

ST3160827AS (firmware 3.42) (40GB/surface, 4 heads, 7200RPM, FDB, CSS, SATA 150MB/s NCQ, 8MiB cache, Agere+SH6950)
I recently upsized my S-tier backup drive (from the ST380817AS) to this. In good health with (mostly) good chips, it deserved a better place than France anyhow (they can keep their STMicroelectronics :P). (And yes, the PCBs swap perfectly between my ST3160827AS and ST380817AS.)
Admittedly, it too is almost full again; but I've now scored an ST3750640AS on eBay (with Agere+SH6960 if the photos are correct), so there's still hope :mrgreen:

ST3160215ACE (firmware 3.ACB) (80GB/surface, 2 heads, 7200RPM, FDB, CSS, UDMA 5, 2MiB cache, 20mm height, Agere*+SMOOTH)
The end of the ST‑10 era (this example produced as late as 2010-06-08), and also the last reliable slimline desktop drive (along with the denser ST3250310AS & ST3250410AS); I salvaged this CE variant (DB35.3) from an LG RH397D HDD recorder with a dead SoC :dodgy:.
I actually quite like their design as by saving aluminium on the flatter base, Seagate could afford to add a damping layer (on later Nighthawks like this one, and all Superhawks) and keep them reasonably quiet (unlike their full-sized Caviar counterparts with undamped covers).
*LSI-branded (since they acquired Agere in the meantime), but still the same at its core…
Last edited by LongRunner on February 10th, 2025, 4:11 pm, edited 1 time in total.
Reason: Put chip types in with the specifications
Information is far more fragile than the HDDs it's stored on. Being an afterthought is no excuse for a bad product.

My PC: Core i3 4130 on GA‑H87M‑D3H with GT640 OC 2GiB and 2×8GiB Kingston HyperX 1600MHz, Exascend EXSAM1A240GV125CCE and ST10000VE001, Optiarc AD‑7200S, Seasonic G‑360, Chenbro PC31031, Linux Mint Cinnamon 20.3.
Backups (external): ST3160827AS with Agere+SH6950 (S‑tier), ST3750640AS with Agere+SH6960 (A‑tier) and WD3003FZEX‑00Z4SA0 (B‑tier).
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HDD mini-reviews – Seagate Special!

Postby LongRunner » February 4th, 2025, 3:28 pm

ST10000VE001 (firmware EV01) (1TB/surface, 10 heads, 7200RPM, fixed-shaft FDB, L/U, SATA 600MB/s NCQ, 256MiB cache)
With my one remaining WD3003FZEX down to its last safe year of runtime, I'm finally giving Seagate the chance to redeem themselves; by my count, this (and the closely‑related FireCuda, although that comes only in 8TB & 4TB for some reason :huh:) would be a Barracuda 7200.19 under Seagate's old (honest) naming.
It's a bit sad how “tarnish-resistant components” now have to be an explicit feature, when you just got them as a right in the older premium 7200s (the classic Barracudas more than anything!), but still nice to know; the 65°C operating maximum (even if technically not as impressive as the older models' 69°C limit on the HDA itself, and 60°C maximum “ambient”*) remains above-par too. Its bottom fixings include both the conventional and revised (enterprise) positions.

Even so, the SMOOTH chip and flip-chip MCU (which is probably necessary at this density and data rate, but still…) – both in BGA – aren't likely to outlast the QFP Agere MCUs and Texas Instruments SH6950D motor drivers on my ST380817AS & ST3160827AS; so my ST3160827AS is staying for S‑tier backups, the ordered ST3750640AS (hopefully) for A‑tier, and I've retired the WD3003FZEX to B‑tier. I can confirm that Seagate's lead-free soldering skill peaked in 2006 or 2007 (when my ST3320620A was made), too :blush: (and was already close by late 2004, on both of those 7200.7s); plus the PCB has been cut back to plain copper pads (versus HASL on the Barracuda ATA I–V, and even the immersion-silver on SCSI and 7200.7/8/9/10 showed some effort), but at least it's still proper FR‑4.
It performs as well as expected and seeking, while quite audible, is no worse than modern Blacks (indicating that Seagate is indeed using an iteration of the Just‑In‑Time algorithm they pioneered in their high‑RPM drives, before Western Digital stole credit by implementing their own version as IntelliSeek :rolleyes:)

*64°C maximum on the HDA and 5–55°C ambient for the Barracuda 7200.7 Plus (ST3200822AS, ST3200822A, ST3200021A & ST3100011A).

Maybe separating the read/write channel from the MCU again (like it was on the Barracuda ATA IV) would be wise – so the channel could be flip‑chip (for signal integrity) and the hotter MCU in a QFP (or at least ordinary wirebonded, fully‑overmolded BGA) for thermal cycling endurance? Constellation ES.4 and earlier are implied to still use SnPb bumps (observing the China RoHS section in their manuals) for this and likewise the flip‑chip preamplifier/commutator in the HDA, but even this is no longer mentioned in the latest manuals…


ST2000NX0253 (firmware SN04) (200GB/surface, 10 heads, 7200RPM, fixed-shaft FDB, L/U, SATA 600MB/s NCQ, 128MiB cache, 2.5″/15mm enterprise)
Even after the utterly-regrettable Maxtor merger, Seagate (unlike Maxtor itself :silly:) had a good side – introducing the adorable Constellation 2.5″ nearline HDDs, channeling IBM's “Star” naming theme after having already done a stellar job (pre-merger anyway) of taking over the Deskstar's spirit once they fell :mrgreen:
The first Constellation was 500GB (3×167GB, also available in 160GB with just 2 heads), the second 1TB (4×250GB, also available in 500GB and 250GB obviously with 4 and 2 heads respectively) and this is the 2TB third generation (5×400GB, also available in 1TB with 5 heads); still produced today despite its stalled development (renamed to Exos 7E2000 including this one from 2018‑12‑12, but retaining the same model numbers).

And I'll be darned if these aren't perfectly miniaturized Barracudas; delivering (or even surpassing) the same 8.5ms seek, but doing so almost silently (unlike the SATA Barracuda 7200.7s :rofl:) Obviously Maxtor's (mis)managers already obliterated the Barracuda name's own reputation, but you get the idea.
Seagate also took their niche status as an opportunity to build them to a higher standard than their bigger brothers – at least inasfar as they chose a nice robust gold‑plated head connector, rather than the tin-plated pressure pins on the ST10000VE001 (even though both drives have gold-plated spindle connectors).
(See likewise, the equally-adorable Kambrook KRC300 rice cooker.)

While my sample isn't holding up as well as the old Barracudas, the higher density may make that a tall order anyhow; but it's still holding on after >4 years 24×7 (in its original server), which is respectable enough. Squeezing in 5 platters did reduce their operating shock resistance to 25G, but at least being enterprise‑oriented they're honest about it (meanwhile vindicating my long-standing instinctual distrust of modern ultra-thin laptop drives)…

(It's a pity Seagate never made a Savvio SATA while it mattered, though; sure WD made the VelociRaptor, but that had major firmware bugs.)
Anyhow I expect to reuse it in an SFF desktop later, probably alongside an Exascend PE3 or similar enterprise-grade SSD :cool:
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HDD mini-reviews – part 12 (new-old Seagate arrivals)

Postby LongRunner » February 6th, 2025, 3:25 am

ST3750640AS (firmware 3.AAD) (93.75GB/surface, 8 heads, 7200RPM, FDB, CSS, SATA 300MB/s NCQ, 16MiB cache, Agere+SH6960)
Back when Seagate drives had nice codenames they were happy to show off (even if they didn't actually do so here) – Snowmass (Barracuda ATA IV), Avalanche (Barracuda ATA V, albeit shortened to just “AVA” on the base) and Alpine (Barracuda 7200.7) were pleasant enough (if somewhat inaccurate given their toasty linear regulators for the MCU core and SDRAM); Puma (the NCQ 7200.7, despite sharing the same ALPINE‑labeled base) made sense as a little‑brother to the Cheetah (with best‑in‑class 8.5ms seeking, and ironically far more reliable than the BB‑encumbered 10K.6); Tonka (Barracuda 7200.8) was indeed built like a Tonka truck, and Galaxy (this multi‑platter Barracuda 7200.10/ES.1) accurately reflected its then‑galactic 750GB flagship (and on 4 platters thanks to the combined powers of TMR and perpendicular recording, whereas Hitachi needed 5 platters in their previous 7K500 and later 7K1000 despite the benefit of unload ramps allowing lower flying heights) :cool: And the seller's photos were correct :clap:
(The serial flash memory and TVS diodes are from STMicroelectronics, but at least they're replaceable.)

It indeed has the two RV sensors like on the upsold Barracuda ES.1 (ST3750640NS) as well; so Seagate didn't willingly skimp on reliability. There are 25 reallocated sectors, but as long as they don't grow further, it gets the honor of my A‑tier backup drive (the ST3160827AS with perfect S.M.A.R.T. for S‑tier).

ST380023AS (firmware 3.01) (30GB/surface [short-stroked slightly], 3 heads, 7200RPM, FDB, CSS, SATA 150MB/s, 8MiB cache, STMicro+SMOOTH)
Not as much joy here :-/ (obviously given the SeaShield, you usually have to buy these “blind”) but the soldering still would satisfy NASA, and I can still use it as a test platform for my upcoming “Snowball” buck-converter modification PCB…
And both the +5V and +12V TVS diodes are from reputable manufacturers here (ON and Fairchild), so I can swap them with the ST3750640AS.

Seagate was right to “test the waters” before officially uniting the ATA and former-SCSI Barracuda lines into the 7200.7, though, as it doesn't cooperate with my StarTech enclosure (spins and seek‑tests but doesn't detect, whereas the ST380013AS works just fine in there); but seems to work fine internally.

That said – if you get an ATA V in good health with Agere+SH6950, then it's sheer divinity (the last Barracuda with leaded solder throughout, but no BGA like on the Barracuda ATA II/III/IV; and also continuing with the upsized headstack bearings as in the IV, before the 7200.7 returned to the regular size)…
Last edited by LongRunner on February 10th, 2025, 4:13 pm, edited 1 time in total.
Reason: Put chip types in with the specifications
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