SD Card HUB

Comments

• Peter Jakacki Posts: 10,193

  2018-05-17 23:43

  Ugghhh! SD cards may be Flash memory and they work really nicely for cameras and for embedded data logging but they are so super slow for PC use. Most SD cards and Flash drives for that matter do not report sustained write speeds or any speeds at all, except maybe the theoretical speed of USB2/3 (USB3 - ten times faster! V30 will give 30MB/s write sustained but Class 10 is only 10MB/s and does not specify for how long.
  
  You can get 5TB laptop internal HDDs, isn't that better than an external thingy dangling around waiting to be knocked out in the middle of a copy?
• erco Posts: 20,250

  2018-05-18 00:10

  Interesting, I don't think I've seen an SD hub. USB hubs, yes, and multi-media to USB adapters, certainly.
  
  Per Peter, speed is likely be an issue.
  
  I have a drawerful of micro SD (TF) card adapters leftover from various camera drones. I wonder if you could use 5 of those with 5 uSD cards in a 5-port USB hub.
  
  Adapter like: https://www.ebay.com/itm/253319609214 or https://www.ebay.com/itm/323213434470
• AwesomeCronk Posts: 1,055

  2018-05-18 00:40

  Hmm. maybe I will just gut the USB2.0 HUB that I have and mount it to my laptop's rack. I have it on a cookie-cooling rack to prevent overheating and other issues.
• wmosscrop Posts: 406

  2018-05-18 14:33

  Flash memory wears out, too. SD cards were not designed to replace disk drives.
  
  Yes, some of the cards use wear leveling. But there's usually some critical regions on the card that end up being updated frequently.
  
  And, is it worth it?
  
  https://technet.microsoft.com/en-us/library/ff356869.aspx
  
  
  
• DaveJenson Posts: 372

  2018-05-18 14:53

  I found this through a google search:
  
  https://directron.com/cr4sdhub.html?gsear=1&gclid=EAIaIQobChMI8LOuqcGP2wIVC77ACh0p2wkFEAQYAiABEgJeYfD_BwE
• kwinn Posts: 8,697

  2018-05-18 14:56

  wmosscrop wrote: »

  Flash memory wears out, too. SD cards were not designed to replace disk drives.
  
  Yes, some of the cards use wear leveling. But there's usually some critical regions on the card that end up being updated frequently.
  
  And, is it worth it?
  
  https://technet.microsoft.com/en-us/library/ff356869.aspx
  
  

  
  Might be worthwhile for storing data that is read often but rarely changes.
• DaveJenson Posts: 372

  2018-05-18 14:58

  I found this:
  https://directron.com/cr4sdhub.html?gsear=1&gclid=EAIaIQobChMI8LOuqcGP2wIVC77ACh0p2wkFEAQYAiABEgJeYfD_BwE
• AwesomeCronk Posts: 1,055

  2018-05-19 23:53

  DaveJenson,
  I have seen this before. I was thinking of buying it, but decided against SD cards.

  Peter Jakacki wrote: »

  Ugghhh! SD cards may be Flash memory and they work really nicely for cameras and for embedded data logging but they are so super slow for PC use. Most SD cards and Flash drives for that matter do not report sustained write speeds or any speeds at all, except maybe the theoretical speed of USB2/3 (USB3 - ten times faster!

  
  
• wmosscrop Posts: 406

  2018-05-21 12:10

  kwinn wrote: »

  wmosscrop wrote: »

  Flash memory wears out, too. SD cards were not designed to replace disk drives.
  
  Yes, some of the cards use wear leveling. But there's usually some critical regions on the card that end up being updated frequently.
  
  And, is it worth it?
  
  https://technet.microsoft.com/en-us/library/ff356869.aspx
  
  

  
  Might be worthwhile for storing data that is read often but rarely changes.

  
  Yes, that's their intended purpose. Camera pictures/video for example.
  
  But as additional RAM (swap disk)? Not for me.