Unraid setup cache drive free#

When writing directly to the array, parity data is calculated and written in real time. Writing directly to the array in Unraid should be avoided when possible.Each cache pool can service one or many shares.This is why I recommend splitting your file types into many shares, instead of using one large вЂњmediaвЂќ share. Each share can only utilize one cache pool at a time.You can have multiple cache pools (as long as youвЂ™re running Unraid version 6.9.X or higher).Sometimes they are configured in multi-disk (JBOD), which simply adds them together with no speed or redundancy benefit. Typically, multiple cache drives are configured in RAID 0 (speed) or RAID 1 (redundancy). You can have multiple drives in a single cache pool.leave the big drives not spinning to save some electricityДЇirst, letвЂ™s go over how cache works in Unraid.The main goals of using a beater 1TB drive as a cache is to: So, because iвЂ™m not an unraid user, I need you to dumb it down even further for me. I keep the HDD cache pools spinning, and thereвЂ™s one for each of my shares (another reason to not just use a single large share called вЂњmediaвЂќ). I use multiple HDD cache pools + CA Mover Tuning plugin to reduce drive spin up even further. Out of 28 HDD (+2 parity) only about 3-5 are spinning daily. Honestly the server isnвЂ™t used that much, itвЂ™s basically a media archive. I spin down drives when not in use to save power. I have a lot of hard drives in this server.

Many people have been using them in RAID0 for an unpack directory, as to not thrash their main SSD. These are great for use in single drive, BTRFS RAID0 (stripe) or RAID1 (mirror) depending on what you want to use them for. I encouraged BitDeals to put up a few 2-packs of 300GB to 1.8TB drives. I donвЂ™t store anything important there, period.ДЄnother option is cheap, small, but fast 2.5' SAS 10k/15k RPM drives. I use 1TB WD Blues for Server 1, because thatвЂ™s what I had handy and that server is SATA only. Literally any HDD will work for bulk file ingest, even standard consumer ones. Quiz yourself: do you know what the following mean?

This is a good time to review how cache works on Unraid.Д¬heck out this video: Unraid storage & operation basics - parity, cache, & your data - YouTube.

This wonвЂ™t work for every use-case, so adapt it to your personal needs.

Unraid setup cache drive free#

Hell, the 1TB drives I use in the guide were free with the HP S01 I recently bought. HDDs are cheaper per TB than SSDs by a huge margin.Reducing the responsibilities of your SSD cache will increase its performance.They are cheap and will prevent SSD wear. Smaller 10k/15k RPM HDDs in RAID0 are plenty fast for unpack directories.HDDs generally sequentially read/write much faster than GbE, meaning this is ideal for large files such as media.Also, thereвЂ™s no point in writing certain files to a SSD cache if the performance will be the exact same writing to a HDD cache instead. Sure, there are high endurance SSDs (and I always recommend them), but they are often more expensive than вЂњnormalвЂќ SSDs. If you can limit writing to your SSD, it will last longer. SSD endurance is something that should be on everyoneвЂ™s radar.IвЂ™m not suggesting ditch your SSD cache entirely, I havenвЂ™t done that on any of my servers.Hey everyone, this will be a quick overview of how I use HDDs with multiple cache pools.