On Wed, Apr 19, 2023 at 3:35 AM Peter Humphrey <pe...@prh.myzen.co.uk> wrote: > > On Wednesday, 19 April 2023 09:00:33 BST Nikos Chantziaras wrote: > > > With my HDD: > > > > # smartctl -x /dev/sda | grep -i 'sector size' > > Sector Sizes: 512 bytes logical, 4096 bytes physical > > Or, with an NVMe drive: > > # smartctl -x /dev/nvme1n1 | grep -A2 'Supported LBA Sizes' > Supported LBA Sizes (NSID 0x1) > Id Fmt Data Metadt Rel_Perf > 0 + 512 0 0 >
That command, on my system anyway, does pick up all the LBA sizes: 1) Windows - 1TB Sabrent: Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 + 512 0 2 1 - 4096 0 1 Data Units Read: 8,907,599 [4.56 TB] Data Units Written: 4,132,726 [2.11 TB] Host Read Commands: 78,849,158 Host Write Commands: 55,570,509 Error Information (NVMe Log 0x01, 16 of 63 entries) Num ErrCount SQId CmdId Status PELoc LBA NSID VS 0 1406 0 0x600b 0x4004 0x028 0 0 - 2) Kubuntu - 1TB Crucial Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 + 512 0 1 1 - 4096 0 0 Data Units Read: 28,823,498 [14.7 TB] Data Units Written: 28,560,888 [14.6 TB] Host Read Commands: 137,865,594 Host Write Commands: 209,406,594 Error Information (NVMe Log 0x01, 16 of 16 entries) Num ErrCount SQId CmdId Status PELoc LBA NSID VS 0 1735 0 0x100c 0x4005 0x028 0 0 - 3) Scratch pad - 128GB SSSTC (No name) M.2 chip mounted on Joylifeboard PCIe card Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 + 512 0 0 Data Units Read: 363,470 [186 GB] Data Units Written: 454,447 [232 GB] Host Read Commands: 2,832,367 Host Write Commands: 2,833,717 Error Information (NVMe Log 0x01, 16 of 64 entries) No Errors Logged NOTE: When I first got interested in M.2 I bought a PCI Express card and an M.2 chip just to use for a while with Astrophotography files which tend to be 24MB coming out of my camera but grow to possibly 1GB as processing occurs. Total cost was about $30 and might be a possible solution for Gentoo users who want a faster scratch pad for system updates. Even this second rate hardware has been reliable and it pretty fast: https://www.amazon.com/gp/product/B09K4YXN33 https://www.amazon.com/gp/product/B08ZB6YVPW mark@science2:~$ sudo hdparm -tT /dev/nvme2n1 /dev/nvme2n1: Timing cached reads: 48164 MB in 1.99 seconds = 24144.06 MB/sec Timing buffered disk reads: 1210 MB in 3.00 seconds = 403.08 MB/sec mark@science2:~$ Although not as fast as M.2 on the MB where the Sabrent M.2 blows away the Crucial M.2 mark@science2:~$ sudo hdparm -tT /dev/nvme0n1 /dev/nvme0n1: Timing cached reads: 47660 MB in 1.99 seconds = 23890.55 MB/sec Timing buffered disk reads: 5452 MB in 3.00 seconds = 1817.10 MB/sec mark@science2:~$ sudo hdparm -tT /dev/nvme1n1 /dev/nvme1n1: Timing cached reads: 47310 MB in 1.99 seconds = 23714.77 MB/sec Timing buffered disk reads: 1932 MB in 3.00 seconds = 643.49 MB/sec mark@science2:~$
