2015年5月26日 · 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 SSD.

2011年7月29日 · Yes, you shouldn't have any problems. In fact, you'd probably only be able to find the newer SAS2 (6G) disks from HP at this point.

2013年12月11日 · Obviously not. If the backplane is SAS 1 - it will use SAS 1. That said - if that is a 8 port Supermicro 8x2.5" in 2x5.25" - IT WILL NOT WORK ;) The chip there is not SAS 2 compatible. Found that out the hard way ;) –

2016年3月31日 · I am wondering what the maximum size a single physical disk can be under the SAS-2 6Gbps spec. I remember from past experience that a SAS-1 controller will see only the first 2 TB of a disk which is larger. I am putting together a backup server which uses SAS-2 controllers and expander backplanes.

For a 15K RPM drive, a seek-time of 2.6ms and latency of 2.0ms gives an IOPS number of 217 . For a 15K RPM drive, a seek-time of 3.4ms and latency of 2.0ms gives an IOPS number of 185. These are just examples based on a selection of current (as of this writing) drives from Seagate. Interface (SAS vs SATA) doesn't impact these numbers meaningfully.

2015年5月28日 · 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.

2014年12月18日 · I've been tasked with building some large storage and i'm first working to expand my SAS knowledge. As i consider transfer bottlenecks and SAS speeds, i can't help but wonder how 12 Gb/s SAS equates to 4800 MB/s of transfer. From a pure conversion standpoint those numbers don't equate, so i assume it has to do with theoretical vs actual speeds?

2011年8月15日 · Are SAS 3Gb/s controllers (SAS1) forward compatible with newer SAS2 drives specified at 6Gb/s? The controller I have in mind is an LSI SAS1064. I know that SAS2 controllers are backwards compatible...

2009年12月4日 · A 2.5" SAS drive currently reaches capacities of 147 GB at 10,000 RPM rotation speeds, or 73 GB if you want a 15,000-RPM drive. At the same time, 3.5" SAS and SCSI hard drives have been available in capacities of 300 GB for a while.

2014年8月11日 · Those usually have 1 or 2 x 4-lane SAS connectors linking them to the main server. Let's assume 4 x 6Gbps, so 24Gbps total bandwidth. Things are definitely oversubscribed there, as you may have 24 disks linked at 6Gbps... but recall that most disks won't be able to achieve more than 1.5 or 2Gbps in practice, so that level of oversubscription is ...