See also harddisk CLI

Warning status October 2021:
The performance of SSD's you buy can be different compared to what your have read in a review. For more read: Adata and other SSD-makers swapping parts and Buyer beware Crucial swaps p2 SSDs tlc NAND for slower inferior qlc chips
Affected brands: Adata, Crucial, Samsung and Western Digital

“most SSD manufacturers hold their enterprise and data center SSDs to tighter component variation standards than their retail lines: When things go wrong for business customers, it can cost from tens of thousands to millions of dollars.”¹⁾

The case: There is a PC with 3 SATA ports. On the first SATA port the internal harddisk is connected. When the PC is booted this drive becomes sda However, when an external harddisk is connected to the second (middle) SATA port, the first drive becomes sdb and the second drive sda. Connecting the first drive to the third SATA port does not solve the problem, it still becomes sdb. This is not convenient when writing a script since the drivename can change from /dev/sda to /dev/sdb.

We see two solutions

• Solve the problem in Linux somehow. An investigation into this matter has to be preformed.
• Make the script fool proof. This has not been adressed yet.

Any ideas? Please let us know

See also our Computer dictionary

LMR: Longitudinal Magnetic Recording. Successor: PMR
PMR: Perpendicular Magnetic Recording
SMR: Shingled Magnetic Recording
CMR: Conventional Magnetic Recording = SMR

SMR (Shingled Magnetic Recording) disks write overlapping tracks to achieve a higher density. This has some disadvantage. t.b.d. We prefer non PMR disks.

HDD fabrikanten verzwegen gebruik shingled magnetic recording bij sommige disks
Western Digital and Seagate reportedly shipping slow SMR drives without informing customers
SMR CMR which hard drive is best for which purpose
PMR (CMR) and SMR hard disk drives

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