Chris Adams: > > That's a misunderstanding of how things work. The SATA port speed is > > just an upper-bound on transfer, but has nothing to do with how fast a > > device can actually read data (similar to having a 1G network card and > > even Internet service doesn't mean sites will serve data to you at 1G). > > Traditional spinning hard drives typically do top out in the > > neighborhood of 150 MB/s... and in fact, the official spec from Seagate > > for that drive is an average read rate of 156 MB/s. Is that really megabytes or megabits per second? And the converse applies to Stephen, remember when you're measuring one thing against another, and they use the two different things. Convert gigabits per second into megabytes per second, and it seems far less impressive. Even more so when they mix up the usage of 1024 or 1000 bits and bytes multipliers. Stephen Morris: > If that is the case why does the specs for that device under > performance say it will support speeds of 1Gb/s, 3Gb/s and 6Gb/s. Because big numbers are a marketing ploy... Sure, there's *something* that the SATA port can do at that speed, but it's not continuously churn your data through in the way that you'd like. If they put high speed cache between SATA port and internal storage, they can increase data through-put up to a point (to the point where it's filled the cache). So it's quick for storing one or two very large files, because they're measuring the SATA data speed. But internally, the cache is transferring over to the storage medium at a much slower rate. And maybe you could get a RAID device which has SATA ports to the PC, so it can spread the load internally across several drives and keep up with a very high data speed. I've never looked to see if anyone has actually done that. I remember when IDE went over to UDMA (same two inch wide [approx] fat ribbons, with twice the wires in them). It could achieve much higher data speeds across the cable, but the drive medium was a bottle neck. Then they put cache RAM in the drives, and that allowed more data to be quickly dumped across the cable to the drive, but the same problem existed: Once the cache was full, you're down to the slow speed of the storage medium inside the drive. -- uname -rsvp Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
