Software Raid With Ssd

1. Raid Ssd And Hdd

Yeah, it is possible, however its a terribly bad idea. Besides the performance thing, your total drive size would be limited to twice the size of the SSD. All the extra space on the HDD would not be used. There are also many secondary considerations like defrag and indexing which should not be used on SSD's as they can affect the life of the drive considerably and provide no real performance benefit, but yet these services should be used on standard drives to enhance performance.

Do you fully understand exactly what RAID means and what it does? Your questions suggest that you lack a of basic understanding of how SSDs, HDD's, and RAID actually works.To expand a little more, its not a good idea to put SSD's in RAID either. You cannot use TRIM if you RAID them, which will actually hinder performance and possibly decrease the usable lifespan of the drive. SSD's are so fast anyway, they are nearly 'instant', you won't gain any noticeable performance by putting them in RAID. In order to take two physical raid groups (your SSD RAID and your 7200rpm RAID) and make a top level RAID with them, you need to do it on the software level.So you would configure your raid for both disk groups through your on-board controller.

Then you would need a third party program in windows to view both raid groups and make a third raid. The problems are many:1) You can't boot from a software raid, because it requires being in a windows environment to work. So no nested RAID groups on boot drives.2) Both VIRTUAL raid groups must be identical in size. You can't setup a RAID 1 between two disk groups that are different sizes. I imagine that your 7200rpm RAID0 is a different size that what your SSD RAID0 would be.

Published Mar 21, 2019 By:Some administrators feel that solid state drive (SSD) redundant arrays of independent disks (RAID) are no longer necessary, or are even a hindrance in some cases. Still, the system remains a popular means of ensuring data availability and storage redundancy. RAID has been around for decades, originally developed to ensure that less-than-perfectly reliable consumer-grade hard disk drives (HDDs) could be used in servers and data centers, and even if a drive failed, the array as a whole would be able to recover.While modern SSDs are than mechanical hard drives, the consequences of a failure are so expensive and time-consuming to remedy that RAID is still an excellent option to ensure data remains available even if individual parts in the system fail. New types of RAID are available, which can survive more than one failure in an array. Once the failed drives are replaced, the system rebuilds itself so that it is safe from a drive failure. Adapting to New TechnologyA factor that has been plaguing storage administrators for years is the increase in rebuild times as drive storage space has grown larger. A RAID5 array from 1990 with seven HDDs storing 4GB each could rebuild in an hour or two; a RAID5 array built today, with seven hard drives at 14TB each, might take days to rebuild.

Raid Ssd And Hdd

SSDs, on the other hand, offer enhanced performance that can decrease rebuild times substantially. White PaperGet your free guide to optimizing SSD over-provisioning for improved cell endurance.In addition to HDD and SSD RAID types and their multiple levels, there are also software- and hardware-based RAID options. Software RAID allows an operating system like Windows Server to stripe data across multiple drives, creating storage redundancy without the need for extra hardware. SSDs are fast enough that a software RAID system can use three or more SSDs and provide acceptable performance — more so if each drive can be connected to separate SATA, SAS or NVMe connectors. A hardware RAID adapter uses a separate processor to handle all the calculations, reads and writes necessary to set up and run a RAID, and will generally provide the optimum performance, albeit with an additional cost. Ensuring RedundancyRAID uses extra disks to ensure redundancy.

The extra capacity required to set up a RAID can range from one drive in seven for RAID5, to twice that capacity for RAID1 or RAID10, which mirrors two sets of multiple drives. One way to recover some of the space used to set up redundancy is to use deduplication and compression of data.Deduplication processes data to remove duplicate copies of files, so that only one copy of any given file is stored, even if multiple copies have been saved. Extra copies are replaced with pointers to the first copy. The pointer is only a few bytes, saving large amounts of space, especially when there are many copies on a system — an extreme example is virtual machines, where dozens or even hundreds of copies of an operating system are stored, and nearly all of the files in each system are identical. Logan Harbaugh is an IT consultant and reviewer.

He has worked in IT for over 20 years, and was a senior contributing editor with InfoWorld Labs as well as a senior technology editor at Information Week Labs. He has written reviews of enterprise IT products including storage, network switches, operating systems, and more for many publications and websites, including Storage Magazine, TechTarget.com, StateTech, Information Week, PC Magazine and Internet.com.

He is the author of two books on network troubleshooting.