problem with USB on HP DC 5850 SFF

[Neill_R_v]

Hello

Here is my problem I have  a seagate 2TB USB hard drive

Bus 001 Device 002: ID 0bc2:ab21 Seagate RSS LLC Backup Plus Slim.

The drive works perfectly on both my HP DC 5850 phenom SFF and my HP G61 notebook.

However if I boot from that USB device inserted in the 5850 it does not boot while it does in the HP G61.

I am thinking it might be a power issue or a timing issue.

As you see below all looks fine when i boot from  another USB flash drive.

Can anyone suggest ways to diagnose this potential hardware - interaction problem please?

hands@hands-HP-Compaq-dc5850-Small-Form-Factor:~$ sudo fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398933504 bytes, 3907029167 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00075dfb

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sda1             4096   21143551   21139456  10.1G 83 Linux
/dev/sda2         21145600 3610923007 3589777408   1.7T  5 Extended
/dev/sda3       3610923008 3907028991  296105984 141.2G 83 Linux
/dev/sda5         52260864   60647423    8386560     4G 82 Linux swap / Solaris
/dev/sda6  *      60649472   79851519   19202048   9.2G 83 Linux
/dev/sda7        577660928  598130687   20469760   9.8G 83 Linux
/dev/sda8        699510784  708435967    8925184   4.3G 83 Linux
/dev/sda9        970022912 1673500671  703477760 335.5G 83 Linux
/dev/sda10      1673502720 1900328959  226826240 108.2G 83 Linux
/dev/sda11      1900331008 2521575423  621244416 296.2G 83 Linux
/dev/sda12       124233728  136153087   11919360   5.7G 83 Linux
/dev/sda13       136155136  219439103   83283968  39.7G 83 Linux
/dev/sda14       219441152  219848703     407552   199M 17 Hidden HPFS/NTFS
/dev/sda15       219850752  577658879  357808128 170.6G 17 Hidden HPFS/NTFS
/dev/sda16      2521577472 2635978751  114401280  54.6G  b W95 FAT32
/dev/sda17      2635980800 2906490879  270510080   129G 83 Linux
/dev/sda18      2906492928 3124867071  218374144 104.1G 83 Linux
/dev/sda19      3124869120 3288717311  163848192  78.1G  7 HPFS/NTFS/exFAT
/dev/sda20      3288719360 3452583935  163864576  78.1G  7 HPFS/NTFS/exFAT
/dev/sda21      3452585984 3473467391   20881408    10G 83 Linux
/dev/sda22      3473469440 3552438271   78968832  37.7G 83 Linux

Partition table entries are not in disk order.


Disk /dev/sdb: 58.5 GiB, 62780342272 bytes, 122617856 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x47c773f6

Device     Boot     Start       End   Sectors  Size Id Type
/dev/sdb1  *         2048 112691199 112689152 53.8G 83 Linux
/dev/sdb2       112693246 122615807   9922562  4.7G  5 Extended
/dev/sdb5       112693248 122615807   9922560  4.7G 82 Linux swap / Solaris
hands@hands-HP-Compaq-dc5850-Small-Form-Factor:~$