Western Digital has been marketing their surveillance-focused storage solutions under the Purple branding since 2014. After the SanDisk acquisition, the company started selling WD Purple microSDXC cards as a complement to the SanDisk High Endurance cards, bringing in ruggedness and durability in terms of weather and humidity-resistance as well as extended operating temperature range (-25C to 85C). The Purple drives and cards come with firmware tweaks that make them a better fit for SMB / SME network video recorders (NVRs) and IP cameras.

In conjunction with the release of the EAMR-enabled 16TB and 18TB WD Red Pro SMB NAS HDDs, Western Digital is also releasing a 18TB WD Purple Surveillance Hard Drive. WD markets the ATA streaming features and caching support in the Purple hard drives under the AllFrame moniker. There are two variants - the AllFrame 4K is for 6TB and lower capacity drives that are 5400RPM versions with a 180TB/yr workload rating. This allows recording of up to 32 simultaneous video streams. The AllFrame AI version (for 8TB and higher capacity drives operating at 7200RPM with a 360TB/yr workload rating) allows recording of up to 64 video streams simultaneously with the reading of 32 video streams for analytics purposes. Specific NVRs also support the Western Digital Device Analytics feature for monitoring the health of the installed Purple hard drives. These drives carry a 1.5M hours MTBF rating and a 3-year warranty. The 18TB drive availability is scheduled for October 2020.

The WD Purple 1TB microSDXC card is the new capacity flagship in the lineup. Similar to the other microSDXC cards in the WD Purple line, the WD Purple SC QD101 1TB version also utilizes BiCS 4 96-layer 3D NAND flash (TLC-based configuration with 500 p/e cycles). The endurance rating is enough for the drive to support up to 512TB of writes. The warranty period is for 3 years from the data of purchase, or the TBW workload limitation (whichever is earlier). Certain IP cameras such as the Tyco Cloud Illustra Series from Johnson Controls also support card health monitoring when microSDXC cards in the WD Purple SC QD101 are used. This allows installers to remotely monitor the remaining lifespan of the installed card, if needed. WD expects the card health monitoring scheme to become available in cameras from other OEMs in the future. Similar to the Purple HDDs, the SC QD101 cards also carry a 3-year warranty. The 1TB version is expected to become available in November.

The prices for the new products are expected to be announced closer to availability.

Source: Western Digital

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  • MrSpadge - Wednesday, September 23, 2020 - link

    4k model vs. AI model with tuning for reads in parallel to writes: I think the firmware should "simply" detect such conditions and adapt its tuning accordingly. This should not be hard-baked into the drives. Reply
  • PeachNCream - Wednesday, September 23, 2020 - link

    Was excited about 1TB microSD until I read it was QLC. This makes it unsuitable inside of one of those cheap 32-64GB eMMC laptops where you dice up a microSD card into a few partitions under Linux and use it as swap and home directory storage to make the system functional despite the tiny on-board storage capacity. Reply
  • Santos L Halper - Wednesday, September 23, 2020 - link

    Wouldn't the fact that it costs more than most of those cheap laptops preclude it's use in such a laptop? There is only so much you can polish a turd, after all. Reply
  • PeachNCream - Wednesday, September 23, 2020 - link

    Why would that matter? It's removable so it can travel from one laptop to another and isn't exactly a loss once the laptop itself is no longer useful. Reply
  • Santos L Halper - Thursday, September 24, 2020 - link

    Well, given that the 512GB version costs over £100, it stands to reason that this 1TB version will cost at least twice as much. That's an awful lot of money to throw at mildly improving the performance of a mediocre laptop. My point being, surely you'd be better off buying a decent laptop with a proper SSD instead? Each to his own, I suppose 🤷‍♂️ Reply
  • antonkochubey - Wednesday, September 23, 2020 - link

    >The WD Purple 1TB microSDXC card is the new capacity flagship in the lineup. Similar to the other microSDXC cards in the WD Purple line, the WD Purple SC QD101 1TB version also utilizes BiCS 4 96-layer 3D NAND flash (TLC-based configuration with 500 p/e cycles).

    Are you sure it's QLC?
    Reply
  • PeachNCream - Wednesday, September 23, 2020 - link

    I was sure it was QLC, but it looks like the article was updated. TLC is not much better from an endurance perspective though there isn't much any of us can do to get more durable NAND given the way the industry is going these days. We have to simply sit around waiting with our >3000 p/e cycles per cell until better technology becomes cost effective. Reply
  • antonkochubey - Thursday, September 24, 2020 - link

    Well, assuming a 8 mbit/s data rate (and that's higher than usual for a security camera) which is 86.4 GB/day, it'd take you 11 days to re-write the card completely. With 500 p/e cycles at your disposal, that's 5500 days - a bit more than 15 years - until it fails. I'd say that's more than enough. Reply
  • PeachNCream - Thursday, September 24, 2020 - link

    That's assuming writes are spread out evenly across the entire card and that there is no static data that remains stored, preventing writes to those cells with unchanging data. Reply
  • antonkochubey - Thursday, September 24, 2020 - link

    Current gen fancy microSD controllers support wear leveling. Reply

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