SDD disk not visible in Raspi

adam.h. · February 3, 2019 at 12:04 PM

I have issue to connect SDD to Raspi - initially I thought it is related to low power, but even when connecting it via USB hub this is still failing - any clues?

Code

[ 2454.933803] usb 1-1.4.4: new high-speed USB device number 20 using dwc_otg
[ 2455.105611] usb 1-1.4.4: New USB device found, idVendor=125f, idProduct=a67a, bcdDevice=93.01
[ 2455.105639] usb 1-1.4.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2455.105655] usb 1-1.4.4: Product: SD700
[ 2455.105671] usb 1-1.4.4: Manufacturer: ADATA
[ 2455.105687] usb 1-1.4.4: SerialNumber: 471213A0700D
[ 2455.110639] usb-storage 1-1.4.4:1.0: USB Mass Storage device detected
[ 2455.116648] scsi host0: usb-storage 1-1.4.4:1.0
[ 2456.128359] scsi 0:0:0:0: Direct-Access     ADATA    SD700            9301 PQ: 0 ANSI: 6
[ 2462.090999] sd 0:0:0:0: [sda] Unit Not Ready
[ 2462.091034] sd 0:0:0:0: [sda] Sense Key : 0x4 [current]
[ 2462.091055] sd 0:0:0:0: [sda] ASC=0x44 <<vendor>>ASCQ=0x81

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**Klojum** · February 3, 2019 at 12:43 PM Official Post

if it's an SSD that was previously connected to a Windows PC:

- check if Windows was properly shut down. Not in suspend mode, not in hibernation mode

- check for disk errors on the SSD if it is an NTFS or FAT partition.

Otherwise, the USB caddy controller maybe somewhat allergic to Linux.

adam.h. · February 3, 2019 at 12:46 PM

Thanks, however the same disk works fine on LE 9 running on Intel box, so I suppose this is something specific to Raspi?

**Klojum** · February 3, 2019 at 1:00 PM Official Post

Apparently. Do you also have dmesg list from the Intel box?

adam.h. · February 3, 2019 at 2:11 PM

here it is:

Code

[  579.474600] usb 1-4: new high-speed USB device number 4 using ehci-pci
[  579.680969] scsi host3: uas
[  579.684084] scsi 3:0:0:0: Direct-Access     ADATA    SD700            9301 PQ: 0 ANSI: 6
[  579.689072] sd 3:0:0:0: Attached scsi generic sg1 type 0
[  581.133167] sd 3:0:0:0: [sdb] 1000215216 512-byte logical blocks: (512 GB/477 GiB)
[  581.133224] sd 3:0:0:0: [sdb] 4096-byte physical blocks
[  581.133805] sd 3:0:0:0: [sdb] Write Protect is off
[  581.133851] sd 3:0:0:0: [sdb] Mode Sense: 5f 00 00 08
[  581.134906] sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  581.150274]  sdb: sdb1 sdb2
[  581.154343] sd 3:0:0:0: [sdb] Attached SCSI disk
[  581.538337] fuse init (API version 7.27)

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**Iridium** · February 3, 2019 at 5:15 PM Official Post

I assume the hub you use is powered. My thoughts seems to suggest, either the HUB or the power supply to it, is causing the issue.

Can you provide the output of

dmesg | paste

adam.h. · February 3, 2019 at 6:53 PM

I changed the hub to another one powered by 3A power supply and it is working now - I expected that RPI can handle SDD without additional power (I'm using 2A for powering RPI)? Would better power supply for RPI help here?

**Jocke.Sve** · February 3, 2019 at 7:11 PM

It might (and should) help, I have only one combination of power supply (3A) and USB cable that works with my RPi3 and 240GB SSD that I use when travelling.

adam.h. · February 3, 2019 at 8:01 PM

Quote from Jocke.Sve

It might (and should) help, I have only one combination of power supply (3A) and USB cable that works with my RPi3 and 240GB SSD that I use when travelling.

Thanks, will try.

**Iridium** · February 4, 2019 at 9:48 AM Official Post

The RPi3 *can* power a SSD but it is not advisable. I've used a SSD directly on the RPi and it works for a bit. However, unless you have a VERY good PSU that keeps a constant 5V over all uses, you will start to see errors.

For safety (and integrity if your data) it's best to use a powered hub.

**Klojum** · February 4, 2019 at 10:14 AM Official Post

An SSD uses less power than a HDD afaik.

**Jocke.Sve** · February 4, 2019 at 6:41 PM

For me it works with that specific combo in combination with:

Code

max_usb_current=1

I've used that RPi/SSD combination quite many times when travelling without any problems.

adam.h. · February 21, 2019 at 8:25 PM

Ok, I can confirm, RPi3B+ powered with 3A power supply can directly use (without a hub) not only 500 GB SSD but also 1.5 TB HD (WD Elements).

So for me this is perfect setup for travelling / vacations.