NAS was on during the night and this morning : no more RAID5 (with 5 WD HDD).

 

After reboot, i see that two disks are missing : 

```

[Sun Jul 18 11:49:11 2021] ata1: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:49:14 2021] ata2: softreset failed (device not ready)
[Sun Jul 18 11:49:23 2021] ata1: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:49:24 2021] ata2: softreset failed (device not ready)
[Sun Jul 18 11:49:38 2021] ata1: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:49:38 2021] ata1.00: failed to set xfermode (err_mask=0x40)
[Sun Jul 18 11:49:56 2021] ata2: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:49:56 2021] ata2: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:49:57 2021] ata1: illegal qc_active transition (00000000->00000001)
[Sun Jul 18 11:50:06 2021] ata1: illegal qc_active transition (00000000->00000001)

```
 

```

11:49 root@helios64 /mnt/internal# ll /dev/sd*
brw-rw---- 1 root disk 8, 32 2021-07-18 11:48 /dev/sdc
brw-rw---- 1 root disk 8, 33 2021-07-18 11:48 /dev/sdc1
brw-rw---- 1 root disk 8, 48 2021-07-18 11:48 /dev/sdd
brw-rw---- 1 root disk 8, 49 2021-07-18 11:48 /dev/sdd1
brw-rw---- 1 root disk 8, 64 2021-07-18 11:48 /dev/sde
brw-rw---- 1 root disk 8, 65 2021-07-18 11:48 /dev/sde1
```

 

What's happening ?

Is it also a PSU that failed (like for HELIOS4 NAS ...) ? PSU unit light seems OK (blue led on the alimentation itself, not flashing)

 

You gotta contact support