hard drive - SAS-3 vs SAS-2 HDDs - Server Fault
May 26, 2015 · SAS-3 supports 12 Gbps while SAS-2 supports 6 Gbps. Many people say that using 12 Gbps disk drives is of no use in present architectures unless there is a flash cache layer in between. 12 Gbps interface can be used with an …
Understanding SAS transfer speeds - Server Fault
Dec 18, 2014 · SAS-3 vs SAS-2 HDDs. 0. SAS-2 6Gbps Maximum Disk Capacity. Hot Network Questions
How much PCI-E bandwidth can my SAS HDD array make use of?
Jul 7, 2020 · Quoting from Max SAS throughput of a disk stack? So one SAS 10K HDD has ≈140 IOPS. With 8KB block it will be just 8 * 140 = 1120 KB/s of throughput. Turning that x18 and you end up with a whopping 20160kb/second. Rounded 20MB. That is 0.1% of your bandwidth. There is a reason SAS is good enough for handling hundreds of discs.
How can I connect a SAS drive to USB? - Server Fault
May 28, 2015 · I need a way of reading the healthy-but-inaccessible SAS disc that does not depend on the only SAS-capable machine I have to hand. So I bought: SAS to SATA Adapter and: USB 2.0 to SATA Adapter with Power...so that I could read the SAS drive via USB. I can plug it all together just fine. The chain looks like: USB -> SATA -> SAS.
How to ensure SAS-3 wide port configuration is enabled?
Sep 14, 2021 · A bunch of SAS 3.0 hard disks in the enclosure. The enclosure and disks work just fine with a single cable attached, but they can optionally be connected with two. Using two cables is recommended by the manual of the enclosure: (The other two mini-SAS-HD connectors listed in the specs of the enclosure are for daisy-chaining more enclosures, but ...
3 Gbps or 6 Gbps SAS harddrives? Does it make a difference?
Dec 9, 2010 · Is there a real-world difference between 3 Gbps and 6 Gbps SAS drives in a server? I keep reading that harddrives don't even fully saturate 3 Gbps yet, so 6 Gbps is nothing gained. I'm using multiple discs across RAID 10 if that matters. Thanks!
Are 6Gb/s SAS drives compatible with 3Gb/s SAS interfaces?
Aug 15, 2011 · In original specs max disk was: HP 300GB 3G SAS 15K 3.5" SP HDD later updated specs for this 3Gb/s controller is listing as supported drive beside others: HP 2TB 6G SAS 7.2K rpm LFF (3.5-inch) Dual Port Midline
Possible to use SAS-2 and SAS-3 HBA in the same system?
Jun 10, 2019 · I'm wondering if it is possible to use a SAS-2 HBA in a "SAS-3" system. I have a Supermicro X11DPH-T and have attempted to install an LSI 9201-16e. From what I understood (which may be wrong), a PCIe 2.0 card may be installed in a PCIe 3.0 slot, but the slot will negotiate down to 5GT/s.
Performance differences between 2.5" vs. 3.5" SAS - Server Fault
Dec 4, 2009 · Currently the largest SAS 2.5" drives are 146 GB for 15k, and 300 GB for 10k. One reason why the SAS 3.5" disks have relatively poor density, is that the platters themselves are far from filling the case, closer to 2.5" size actually. This is AFAIK due to problems with larger platters wobbling slightly at high rpm.
SAS / SATA max number of connected disks vs performance
Apr 23, 2016 · This means that disks connected after a SATA port multiplier / SAS expander are limited by the bandwidth provided by the single upstream port - 1x SATA 6 Gb/s or SAS 3.0 12 Gb/s port. You can combine multiple upstream port to provide added performance, but the basic problem remains: you share multiple downstream port connected by few upstream ...