New answers tagged

5

The model of SSD in your server has well-known and widely-reported performance issues with writing large data sets. It's cheap junk that even manages to cost more than similar products without these issues. Replace it. (Or, get your host to replace it, in this case.)


0

I can just say that I was lucky that by coincidence I bought a D2700 and a P822 + P830 as this solves all negative aspects on my HP DL385P Gen8 with 8 Bays. I will add 1 Cage so I end up with 16 Bays and the P830 can handle it: The HP Smart Array P830 allows you to connect a total of 16 drives spanning two separate drive cages. ...


0

You have a fundamental misunderstanding of what TRIM is. It's "job" is not to prevent deleted data from being recovered. It's job is to let the firmware in the SSD know that it no longer needs to preserve data ( because it has been deleted ), and armed with that knowledge, the firmware may be able to do a better job of managing the data that it does need ...


1

NCQ is a technology that lets drives re-order the order in which read and write requests are serviced. SSDs save you the seek times hard drives are plagued by, but actually reading from and writing to a NAND die is not especially fast. SSDs get around this by reading and writing to multiple NAND dies in parallel. In order to achieve this SSDs rely on ...


2

NCQ is here to rearrange queued read/write operation in order to minimize heads seeks, maximizing performance. A good benchmark with mechanichal disks and NCQ can be found here However, contrary to commond belive, NCQ is even more important for SSDs. The reason is that while they have no heads, due to their very low latency command queueing become really ...


0

NCQ helps the disc to rearrange sectors read/write operations to favor speed. With the target of less head movements. In case you are using an SSD instead of a rotating magnetic disk, the NCQs speed win will be less noticeable.


0

It could be that your system has --discard=once as default. Have you tried mounting with a specific discard option? # nano /etc/fstab ________________________________________________________________ ... /dev/sda2 none swap ..., --discard=pages,... ... ... and forcing like this: # swapon --discard=pages /dev/sda2 You could also try to make a ...



Top 50 recent answers are included