Linux and Plextor SSD

I own a small Linux Server with a 64GB Plextor M3/M5/M6 Series SSD, first a PLEXTOR PX-64M5M and now a PLEXTOR PX-64M6M. Both drives had firmware version 1.03 and under stress (for example btrfs balance start /dev/sdb) I got loads of error messages like

kernel: ata3.00: device reported invalid CHS sector 0
kernel: ata3.00: exception Emask 0x0 SAct 0x7ffe00 SErr 0x50000 action 0x6 frozen
kernel: ata3: SError: { PHYRdyChg CommWake }
kernel: ata3.00: failed command: WRITE FPDMA QUEUED
kernel: ata3.00: cmd 61/00:48:48:c4:1b/02:00:07:00:00/40 tag 9 ncq dma 262144 out#012 res 40/00:00:00:01:80/00:00:00:00:00/00 Emask 0x4 (timeout)
kernel: ata3.00: status: { DRDY }

The fix is easy, update the firmware to version 1.09 and the problems are gone.

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