reader50

Member
  • Content count

    100
  • Joined

  • Last visited

  • Days Won

    2

Everything posted by reader50

  1. SonicWall NSA 2650 Review Discussion

    How is it doing Deep Packet Inspection of SSL connections? Is it using a zero-day to decrypt the packets? Or is it impersonating the websites connected to using cloned security certs? Unless I'm missing something, the article describes a successful Man-in-the-Middle attack, breaking current internet security, as though it were a routine feature.
  2. 12TB performance reviews?

    Would you accept a 12TB BarraCuda Pro review? They don't claim it to be an enterprise-class, but it's expensive enough to qualify. $500+ on newegg.
  3. It can't be impossible - Seagate plans to ship HAMR samples to their customers (I think this means OEM partners) this year, with product hitting the general market in 2018 or 2019.
  4. HAMR and MAMR can't come fast enough. I'm not impressed with SMR, and both these techniques eliminate SMR. It doesn't matter if the magnetic field spreads out, since it only flips bits where the laser or microwave beams fall. However, WD's projection of only 40TB by 2025 isn't very impressive. 8 years to triple capacity?
  5. Largest 2.5" 12.5mm PMR drive?

    The M9T is 9.5mm, which shouldn't be a problem. I've had one in my laptop for a couple years now. It's been trouble-free. note: the M9T has also been sold under the Seagate label, though the model number usually still has "M9T" somewhere in the text. Might give you more options to find better prices.
  6. Largest 2.5" 12.5mm PMR drive?

    Everything 2+TB is in the 15mm size. I'm waiting for 2+ in the 9.5mm size, so far no dice. It's like they're waiting for SSD prices to fall enough. Then concede the 2.5" market.
  7. Beware that it's SMR, even though they're calling it an enterprise HDD. Hs14, not He14.
  8. What kind of drive is it? SATA drives can't do a real low-level reformat the way SCSI can. But they can report error codes via SMART.
  9. It's good to see Toshiba join the 10TB club. As WDs helium drives appear to be rebranded HGSTs, there were only two competitors before. Now if only Toshiba can get the drives out soonish. Their 8TBs took a couple months to reach the public. I'm due for a backup array upgrade, so hopefully the 10s can reach market by Black Friday.
  10. New datagrave needed

    I've run five Toshiba MD04ACA500's for a couple years now (5TB) without a single failure. They weren't even bought bare, I harvested them from external enclosures.
  11. I assume the proliferation of higher bay counts (and growing popularity of RAID solutions) is caused by hard drive sizes not growing fast enough. Over the last decade, storage has hit several stalls. But data needs have continued to grow, especially with higher video resolutions. The consolidation of HDD manufacturers down to 3 didn't help. The need for 2-stage positioning motors for higher track counts. Took 2 years to solve, though the introduction of PMR halfway through reduced the pain. The 7200.11 fiasco. Afterwards everyone went super-cautious on new model introductions. Because they didn't want to make the same mistake. This also caused the proliferation of 5400/5900 RPM drives, when they had been going extinct in the 3.5" size. The Malaysian floods. Plus the jacked prices after the floods, which the manufacturers liked so much, they foot-dragged on restoring production volume. Result: instead of taking their predicted 6-months to return to normal, it took 2 years before prices returned to pre-flood levels. Their financials showed excellent results over this period. The current state, where they introduce bigger drives again. Without cutting the prices on existing sizes. So you can buy bigger or existing sizes, but your price-per-TB hardly budges. Competition from SSDs would help. But they've been in their own stall for almost two years now. Bigger sizes are introduced, but demand has grown rapidly. You'd think new flash factories would come online fast enough to relieve the pressure. I've been waiting two years to upgrade, but the price stalls on HDDs and SSDs have caused me to hold off. I'm still waiting for a correction to hit.
  12. BackBlaze has posted their Q2 2017 Hard Drive Reliability stats. 83,151 drives this time. Not a lot of surprises. HGST still comes out on top, while Seagate has some problems with their 4TB models. The 8TB models look good regardless of manufacturer. Biggest surprise for me: BackBlaze has begun deployment of 12TB drives, and in decent quantity too. They don't say what model(s). HGST and Seagate both have 12TB drives shipping, so either is a safe bet. To my knowledge WD hasn't announced anything past 10TB, while Toshiba has just gotten their 8TB models shipping in quantity.
  13. When you save an updated file. Or the OS appends a log file. The change may be trivial from your perspective (perhaps only a few bits altered) but the SSD cannot erase/rewrite tiny spaces. Only the huge internal blocks.
  14. "Garbage collection" refers to software rather than drives. When a program no longer has use for variable space (usually strings or arrays) then that storage space becomes "garbage". Garbage collection refers to releasing that space to the memory manager for reuse. The user cannot do anything about garbage collection. The app developer has to do that, and the OS developer can provide tools to make it easier. "Trim" is a function used to help SSDs remain efficient. If you delete a file, the OS usually only wipes the filesystem directory entry and updates the bitmap to show those blocks are free space. The OS doesn't usually write zeroes to the blocks that the file used to occupy, because this would take time; the computer would act slower. However, the SSD is independent of any particular OS or filesystem. It doesn't know how to read directory entries or volume bitmaps. It keeps its' own map of blocks that have been written to, but internal SSD blocks are big. Say, 32 MB big. These are the smallest "zones" that an SSD can erase. Unlike a hard drive, an SSD cannot erase standard 512-byte blocks at will. Only relatively huge blocks. When it comes time to modify contents in an internal block, the SSD must do a dance. All unchanged data has to be copied to a standby block, along with the modified data. The old block is then erased and becomes a standby block. All of this takes time. If the SSD is running low on standby blocks (overprovisioning), it can take a lot of time for the SSD to consolidate used space into fewer blocks. Trim works by letting the OS notify the SSD that a particular space is actually free. Although data has been written to that space in the past, it should now be disregarded. When the SSD has to manage it's internal blocks, that space need not be copied. If the OS and SSD both support Trim, then it works automatically. Whenever a filesystem block is freed up, Trim passes the info to the SSD. The SSD uses the info to act more efficiently, which the user sees as the SSD running faster. As to your last question about Trim, the user could turn it off. But who would want to. A utility could be used to read an existing filesystem, then send Trim notices for every free block in the file system. This would be useful if the SSD had previously been used with an OS that didn't support Trim. Such OSes are in the past today, so such a utility wouldn't do anything.
  15. This is a timely and useful offer. Kudos to DriveSavers -- and it won't hurt them in the long run. People who need the service (or just hear of it) may well try DriveSavers first the next time. For anyone who does need it - remember, the drive(s) must be shipped by September 15.
  16. News thread missing

    The recent DriveSavers story is missing its associated comment thread. I wanted to offer kudos to them for their timely offer. Also, I originally put this comment in the then-current comments thread here. My apologies - this feedback forum was the proper place. That misplaced comment should be deleted.
  17. Crucial BX300 SSD Review Discussion

    Are the sizes a mistype? If accurate, the BX300 has regressed. BX100 (2015 review): 120, 250, 500 GB, 1 TB BX200 (2015 review): 240, 480, 960 GB BX300 (2017 review): 120, 240, 480 GB
  18. Crucial M500 alternative

    WD recently announced 4-bits-per-cell 3D NAND. Not sure what we'll call it - QLC? 4LC? They didn't mention when product will ship, so 2018 at the earliest. Probably not helpful for your needs, but with 3D QLC coming, I expect 3D TLC is stable today.
  19. Why would the 4, 6, and 8TB be done via dual drives today? Single-drive solutions would be quieter, cooler, and far cheaper for those sizes.
  20. 10TB WD Black alternative?

    From retail drive pictures, the WD Gold appear to be rebranded HGST He drives.
  21. 10TB WD Black alternative?

    HGST does have a 12TB enterprise drive out, currently running $630 on ebay. I've yet to see it in the regular channels. Look for HGST He12 If you are looking for large economical storage, drives in the 6-8 TB range are approaching half the price-per-TB of that He12. A RAID array in a NAS would get you more storage, and probably at a lower price. Admittedly with more noise.
  22. Newbie

    You posted your thread in the right place.
  23. Newbie

    I find myself in agreement.