I too dont like the limited data that SAS drives give you vs SATA drives... Where is the "Enterprise" of SAS drives if i cant get (any) useful data out of them to tell if they are pre-fail?!
that said, i did find this great command, that on my HGST SAS drives gave me a tad more info (addtl, kind of disappointed that smarctl -a , ie --all / is NOT really showing ALL data possible, as its missing this data below, on sas drives that is):
smartctl -l background /dev/da30
(lowercase "L") -- (actually command above is the only way i have found to get my HGST SAS drives' Power on hours (POH) via smartctl, so that is helpful)
if you want to see how useless SAS "smart" data is, this below is the output of a SAS drive that is 100% failing....nice....
that said, i did find this great command, that on my HGST SAS drives gave me a tad more info (addtl, kind of disappointed that smarctl -a , ie --all / is NOT really showing ALL data possible, as its missing this data below, on sas drives that is):
smartctl -l background /dev/da30
(lowercase "L") -- (actually command above is the only way i have found to get my HGST SAS drives' Power on hours (POH) via smartctl, so that is helpful)
if you want to see how useless SAS "smart" data is, this below is the output of a SAS drive that is 100% failing....nice....
Code:
root@freenas:/mnt/new3uRDz5x3disks # smartctl --all /dev/da30 smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.2-STABLE amd64] (local build) Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Vendor: HITACHI Product: HUS723030ALS640 Revision: A222 Compliance: SPC-4 User Capacity: 3,000,592,982,016 bytes [3.00 TB] Logical block size: 512 bytes Rotation Rate: 7200 rpm Form Factor: 3.5 inches Logical Unit id: 0x5000cca03e4afb04 Serial number: YVHA7AED Device type: disk Transport protocol: SAS (SPL-3) Local Time is: Sun Apr 14 20:45:59 2019 CDT SMART support is: Available - device has SMART capability. SMART support is: Enabled Temperature Warning: Enabled === START OF READ SMART DATA SECTION === SMART Health Status: OK Current Drive Temperature: 43 C Drive Trip Temperature: 85 C Manufactured in week 48 of year 2012 Specified cycle count over device lifetime: 50000 Accumulated start-stop cycles: 68 Specified load-unload count over device lifetime: 600000 Accumulated load-unload cycles: 2883 Elements in grown defect list: 0 Vendor (Seagate) cache information Blocks sent to initiator = 20736093531930624 Error counter log: Errors Corrected by Total Correction Gigabytes Total ECC rereads/ errors algorithm processed uncorrected fast | delayed rewrites corrected invocations [10^9 bytes] errors read: 0 269671 0 269671 29810891 560605.872 0 write: 0 1898285 0 1898285 136999 134366.471 0 verify: 0 1879 0 1879 49360 2796.920 0 Non-medium error count: 0 SMART Self-test log Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ] Description number (hours) # 1 Background long Completed - 44172 - [- - -] # 2 Background long Completed - 44099 - [- - -] # 3 Background short Completed - 1 - [- - -] Long (extended) Self Test duration: 27182 seconds [453.0 minutes] root@freenas:/mnt/new3uRDz5x3disks # root@freenas:/mnt/new3uRDz5x3disks # smartctl -l background /dev/da30 smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.2-STABLE amd64] (local build) Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org === START OF READ SMART DATA SECTION === Background scan results log Status: scan is active Accumulated power on time, hours:minutes 45824:26 [2749466 minutes] Number of background scans performed: 285, scan progress: 76.48% Number of background medium scans performed: 285