ReadyNas 314 not working with Seagate Expansion 5tb usb

Can you send me your logs?: http://www.readynas.com/kb/faq/misc/how_do_i_send_all_logs

Which file from the log files you are looking for.

I also can't eject the 5th drive. Clicking on the eject has no effect and no errors in the logs

Would like the entire zip file if that is possible. Remove any backup job logs if they make the zip file too big.

I got device serial number in logs I rather not give out. Which log file and I can do some copy and pasting.

The kernel log has this entry sdf1 is the 4tb which works fine sdg1 is the 5tb which is not working

Jul 14 16:25:07 readynas kernel: scsi 7:0:0:0: Direct-Access     Seagate  Backup+ Desk     050B PQ: 0 ANSI: 6
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] Write Protect is off
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] Mode Sense: 4f 00 00 00
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: Attached scsi generic sg5 type 0
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jul 14 16:25:07 readynas kernel:  sdf: sdf1
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] 976754645 4096-byte logical blocks: (4.00 TB/3.63 TiB)
Jul 14 16:25:07 readynas kernel: sd 7:0:0:0: [sdf] Attached SCSI disk
Jul 14 16:25:07 readynas kernel: scsi 8:0:0:0: Direct-Access     Seagate  Expansion Desk   0739 PQ: 0 ANSI: 6
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] 1220942645 4096-byte logical blocks: (5.00 TB/4.54 TiB)
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] Write Protect is off
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] Mode Sense: 2b 00 10 08
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] Write cache: enabled, read cache: enabled, supports DPO and FUA
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: Attached scsi generic sg6 type 0
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] 1220942645 4096-byte logical blocks: (5.00 TB/4.54 TiB)
Jul 14 16:25:07 readynas kernel:  sdg: sdg1
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] 1220942645 4096-byte logical blocks: (5.00 TB/4.54 TiB)
Jul 14 16:25:07 readynas kernel: sd 8:0:0:0: [sdg] Attached SCSI disk
Jul 14 16:25:07 readynas kernel: md: md0 stopped.

Are the two disks partitioned the same way?

They are both plugged into the rear USB3 ports?

Have you tried rebooting the NAS?

Do the USB drives have their own separate power supplies or are they bus powered?

Yes both are ntfs single partition
Yes there are 2 USB 3 ports at the back one for each
I have rebooted NAS multiple times
Yep they each have they're own power supplies plugged in individually.
The one that works which is the 4tb model is a seagate backup plus, the one that does not work which is a 5tb model is a seagate expansion drive. The difference from what I have seen is the chassis one being metal the other plastic, the warranty one is 3 the other is 2 years, but internally they are both standard 3.5 drives of course I'm sure with different firmware. I did test the 5tb drive also plugged into a system and it works fine.

the lsblk.log is identifying it fine

sdf
└─sdf1 ntfs Seagate Backup Plus Drive /media/USB_HDD_1
sdg
└─sdg1 ntfs Seagate Expansion Drive /media/USB_HDD_2

mounts.log file content

tmpfs on /dev type tmpfs (rw,noatime,nodiratime,size=10240k,mode=755)
devpts on /dev/pts type devpts (rw,noatime,nodiratime,mode=600)
/dev/md0 on / type btrfs (rw,noatime,nodiratime,nospace_cache)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime,nodiratime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime,nodiratime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,cpu)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,blkio)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,noatime,nodiratime,fd=24,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)
tmpfs on /media type tmpfs (rw,nosuid,nodev,noexec,noatime,nodiratime,mode=755)
debugfs on /sys/kernel/debug type debugfs (rw,noatime,nodiratime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,noatime,nodiratime)
configfs on /sys/kernel/config type configfs (rw,noatime,nodiratime)
/dev/sdf1 on /media/USB_HDD_1 type ufsd (rw,noatime,nodiratime,nls=utf8,fmask=0,dmask=0)
/dev/sdg1 on /media/USB_HDD_2 type ufsd (rw,noatime,nodiratime,nls=utf8,fmask=0,dmask=0)
/dev/md127 on /data type btrfs (rw,noatime,nodiratime,nospace_cache)
/dev/md127 on /home type btrfs (rw,noatime,nodiratime,nospace_cache)
/dev/md127 on /apps type btrfs (rw,noatime,nodiratime,nospace_cache)
/dev/sdf1 on /run/nfs4/media/USB_HDD_1 type ufsd (rw,noatime,nodiratime,nls=utf8,fmask=0,dmask=0)

system.log has an error on it for sdg

Jul 14 16:38:09 readynas udevd[3722]: failed to execute '/var/run/usb/sdg1' '/var/run/usb/sdg1': No such file or directory
Jul 14 16:39:31 readynas udevd[3750]: timeout: killing '/frontview/bin/setup_usb_storage' [3793]
Jul 14 16:39:31 readynas udevd[3750]: '/frontview/bin/setup_usb_storage' [3793] terminated by signal 9 (Killed)

What does your bios_ver.log look like?