I have eight WD Red drives - four 3TB and four 2TB. The four 3TB devices I bought about a week ago. My machine has four different SATA controllers in it. Two on board and two external. All of the drives listed below except for /dev/sdj test around 140-148MB/s using hdparm -t /dev/
/dev/sdj consistently gets 124MB/s regardless of what controller it is on. This is concerning since this is a disk array and this 20MB/s drop effectively slows down all read access. Has anyone had this happen? If so can I get the drive replaced? (NOT with a refurb.)
ata-WDC_WD20EFRX-68AX9N0_WD-WCC1T0427128 → …/…/sdl
ata-WDC_WD20EFRX-68AX9N0_WD-WCC300511344 → …/…/sdg
ata-WDC_WD20EFRX-68AX9N0_WD-WMC300410333 → …/…/sdd
ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M0069116 → …/…/sde
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0337722 → …/…/sdk
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0506148 → …/…/sdi
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0507375 → …/…/sdj
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0521785 → …/…/sdb