Mickey

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Everything posted by Mickey

  1. It's not a helium-sealed drive. I don't think there are any permanently sealed He drives that are not in the 3.5" form factor. As for helium leaking out over time, that's why the permanently sealed products are designed the way they are, such that whatever leaks out is so small relative to the total volume it really won't be an issue for the expected lifetime of the drive.
  2. Mickey

    WDC Red Pro 8TB Too Quiet

    It must be a helium-filled drive. Moving that much air means it's well-nigh impossible to achieve those acoustics numbers (unless it's a typo ). Spinning in helium results in much less fluid drag, a major contributor to noise. Not sure about the weight. The gap between the 8TB and all the other capacities lead me to believe they are at least 2 distinct platforms.
  3. Pretty much. Cloud has helped a lot, but the volumes can't compete with what used to go into the PC market. Net results is layoffs and difficult times for those in the industry. Combined with many markets replacing magnetic storage with flash, the overall market size keeps shrinking. I don't think it will completely disappear anytime soon, but it will certainly be a lot smaller than it was in its heyday.
  4. Mickey

    Scratched platter

    Drive (and data) are toast. The fall caused the heads to smack into the media, leading to the head crash (that ring-shaped scratch on the disks). It isn't repairable, although data recovery might be possible, albeit *very* pricey.
  5. Been a busy few weeks for announcements from WD. First the Unisplendour investment, then MOFCOM lifting the hold separate requirement, and now buying SanDisk. I do wonder if the former led to the easing of the latter, though. The industry is going through a period of churn and shrinkage. Definitely an anxious time for those in the field.
  6. MOFCOM required the hold separate bit, not the EU.
  7. I don't think it'd be for keeping the motor spinning. That would take way more capacitance than is likely to fit on those boards. But it might be enough power to finish flushing the onboard cache. Press releases are always fun to try and decipher ...
  8. No, they are using 5 platters. The WD subsidiary does not have a 6-platter platform, only the HGST subsidiary does. The current industry form factor defines 6 side mount holes and 6 bottom mount holes. The 2 closest to the SATA/SAS connector are required, while the others are optional (but each drive must provide at least 4 of the 6 holes for both side and bottom). Earlier revisions of the spec only defined 4 and 4 holes. The locations themselves haven't changed, though.
  9. Mickey

    Are fans any threat to a hard disk?

    In storage, it doesn't really matter, provided they're kept within specs, generally -40C up to 70C or so.
  10. Mickey

    P5_133XL

    Thanks for sharing this news. I remember his postings from the early days, too.
  11. Media and heads are all binned, AFAIK. It's not so much that highest performance goes to enterprise, but whichever product needs the densest capacity. That doesn't necessarily mean the highest reliability, though. If two product lines use identical parts, then you can bin the higher quality items to enterprise, but often the different product lines are mechanically different so that's not feasible
  12. Hard to say if it's a manufacturing issue or it's loud by design. By that, I mean, design tradeoffs to achieve some other performance metric, rather than actual defective manufacturing or assembly. Generally, slow changes in position shouldn't cause odd sounds, but dramatic ones can make the drive unhappy and possibly cause damage.
  13. Mickey

    Opened hdd platters...

    Yes. Drives with lesser capacity will use either different parts to achieve that or software to disable the "bad" surfaces to block off the unusable space.
  14. Kevin has already answered. Just about all disk drives use die-cast aluminum bases; those markings are casting markings, such as flash or parting lines. Often, a trim die is used to get it roughly to size, then more detailed cleanup happens with someone holding the base against a sanding belt. The voids are bubbles (porosity) in the aluminum. I think I've seen a few that used stamped steel bases, but that's only going to be with the really small form factor drives. So absolutely nothing wrong with your drive.
  15. Mickey

    Problem with my External HDD

    Does the drive even try to spin up? Did you plug in both SATA and power to the drive? If that doesn't work, then you could try a board swap as shown in the YouTube link Brian provided above. Beyond that, there aren't any options for the average user short of professional data recovery.
  16. Mickey

    Opened hdd platters...

    No. I have access to the equipment to do this properly and I *still* wouldn't bother. Assuming the act of opening up the drive didn't introduce contaminants that are going to kill your drive quickly, you can't always see scratches, with the naked eye, that would cause problems. Plus, you can't see the other disk surfaces without taking out the platters anyway. If you have no plans on paying for data recovery because you do not have the money (or otherwise feel it's not worth it), then try the software recovery methods first. If none of those work and you want to take a chance and swap out parts, you'll have better chances of it working by moving a functioning actuator from a donor drive to your damaged drive than the other way around.
  17. Mickey

    Problem with my External HDD

    Since it's an external drive, it'd be worth checking the obvious things first, like bad cables that got damaged from the drop. Maybe also open the enclosure to extra the drive and see if it works when plugged in directly to the computer via SATA.
  18. Nope. Still kept completely separate. I know the hardware definitely is and I suspect the software is, too.
  19. Different motor vendors have "preferred" methods for laying out the motor flex and solder points. Certain designs opt to use one large exit hole for all the motor leads, while others use 4 (or sometimes 3) smaller holes. As for the original picture, if those are wires poking out beyond the solder, I agree it looks sloppy.
  20. Just leftover blobs of solder. Different motor vendors do that a little differently even on the same HDD model (some might cover with epoxy or apply solder differently).
  21. Mickey

    WD RED spinning at different speeds.

    It's not hard to make the table. The difficulty is picking the correct speeds to avoid the resonances in question, as that can vary between drives. And if you test a large number of drives, you'll have variations, so it'd have to be something the drive would self-detect somehow (and that's way beyond my knowledge of drive FW). Interesting idea, though.
  22. Mickey

    WD RED spinning at different speeds.

    So you're saying the drives can vary their spin speeds on the fly, while reading/writing or only when idling? If the latter, then sure, it's simple and common to do that. Hard drives have a trigger limit set to stop writing when detected vibration (either detected via servo or via sensors) so data isn't risked. If it's bad enough, it'll stop reading, too. Changing speeds to cancel out vibration assumes you know what the target speed should be ahead of time. So it's conceivable that it's done at the factory, though having each drive set its own parameters sounds like a testing nightmare. But changing speeds during reading/writing? I don't see that happening.
  23. Definitely not normal. I've heard that type of thing before with code bugs that manage to excite a mechanical resonance. Once had a drive sing when reading on a particular track.
  24. Mickey

    WD RED spinning at different speeds.

    No hard drive actually reads or writes as the spin speed varies. Drives can (and do) have different speeds in idle mode; it's quite frequent on laptop drives, for example. When heads are parked on the ramp, the drive often spins down to save power and only spins back up right before the heads are unparked.
  25. The drives themselves have one operating speed when actively reading/writing, but when the heads are parked it's quite possible (and probable) that the disks are spun down to some slower speed or even off completely. It's not technically feasible to have multiple operating speeds when reading/writing, though. When using Windows to shutdown the drive, it's possible the drive is using a more elegant spin-down mode than when power is yanked. The latter will result in the heads quickly parking before the back EMF from the spinning-down disks runs out, lest the heads end up stuck on the disks. Maybe the different spin-down modes are coupling with a resonance in the case?