What is a PMR drive?
Perpendicular magnetic recording (PMR) and shingled magnetic recording (SMR) are technologies used to physically store bits of data onto a hard disk drive (HDD). For HDD manufacturers, one of the most important concerns is areal density, which is the number of bits of data that can be recorded onto a magnetic disk.
What are the currently shipping SMR drives?
The Western Digital Drives with SMR are: WD Red 2TB – 5,400rpm – SATA 6GB/s – WD20EFAX. WD Red 4TB – 5,400rpm – SATA 6GB/s – WD40EFAX. WD Red 6TB – 5,400rpm – SATA 6GB/s – WD60EFAX. WD Red 8TB – 5,400rpm – SATA 6GB/s – WD80EFAX.
Is WD Black SMR or CMR?
The company announced that the drives that use SMR technology range from WD Red HDD to WD Black HDDs. The other HDDs use the CMR recording technology that features a wider write head than a magnetic track.
Can you mix SMR and CMR?
You should not mix CMR and SMR drives in the same RAID. But you can have two separate RAID on your Synology or Qnap NAS. If you can still find CMR drives on Amazon or eBay I would get them.
Is SMR OK for Unraid?
You should not be using a hard drive with SMR (shingled magnetic recording) technology as an Unraid parity drive under any circumstances. The parity drives maximum speed will determine your array’s maximum speed.
What is HDD CMR?
Conventional magnetic recording (CMR) and shingled magnetic recording (SMR) are both recording technologies used by hard drives to physically record data using magnetic tracks.
How do I know if my drive is SMR or CMR?
The first indicator to detect whether it is a SMR drive is the cache size. But do look for letters EFAX in the serial number this would mean SMR. Old drives (WDx0EFRX) had 64MB cache whereas new replaced drives (WDx0EFAX) feature 256MB.
Is WD Blue CMR?
Drive series featuring SMR include the WD Red and WD Blue HDD series, both of which come in a 3.5″ form factor. All other HDDs in these series use different recording technology called CMR or conventional magnetic recording.
Is SMR bad for gaming?
SMR is fine for anything but a system drive. Any drive expecting a noticeable quantity of writes should be SSD anyway. Any drive with a noticeable quantity of anything should be SSD. SMR kills write performance (no, seriously, it’s awful) for better density.
Which WD drives are available with Advanced Format?
WD drives with Advanced Format include special installation information on the drive label so be sure to read the label on your drive before installing it. WD is currently implementing Advanced Format technology on its WD Caviar Green line of products, beginning with the WD20EARS, WD15EARS, WD10EARS, WD7500AARS, WD6400AARS and WD5000AARS models.
What is the release date of the st3000dm 008?
Release date: Q3 2016. more Based on 93,739 user benchmarks. Models: ST3000DM008-2DM166, ST3000DM008-2DM1, ST3000DM 008-2DM166, ST3000DM ST3000DM008-2DM1, ST3000DM008-2D0166, Seagate ST3000DM008-2DM1, ST3000DM 008
How good is the WD black 3TB (2013) at storing data?
This is an excellent result which ranks the WD Black 3TB (2013) near the top of the comparison list. The range of scores (95th – 5th percentile) for the WD Black 3TB (2013) is 33.9%. This is a relatively narrow range which indicates that the WD Black 3TB (2013) performs reasonably consistently under varying real world conditions.
What WD and HGST hard drives are SMR?
What WD and HGST hard drives are SMR? May 4th 2020 (Updated July 3rd 2021) in HDD Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. But it is not recommended to use SMR drives for applications with significant load (for example in NAS boxes or for 24×7 use).