Hi all
Recently I became aware that my system reports a "Synchronize Cache(10)
failed" error whenever a Samsung T5 500 GB SSD is unplugged:
sd 11:0:0:0: [sdg] Synchronizing SCSI cache
sd 11:0:0:0: [sdg] Synchronize Cache(10) failed: Result: hostbyte=0x07
driverbyte=DRIVER_OK
Occasionally the "hostbyte" is 0x01 instead of 0x07. I don't think this is
a new problem since it's been occuring possibly since I started using the T5
in early 2021. A second Samsung T5 (a 250 GB model) triggers the
same messages when removed.
To produce the failure message it is necessary to simply connect the drive
and then remove it. Mounting a filesystem from the drive is not required.
The Linux system does not auto-mount these drives.
I have seen the problem under kernels 5.15.38, 5.15.72, 5.15.117 and 6.1.52.
The T5 uses uas by default. I have tried forcing the use of usb-storage
with
options usb-storage quirks=04e8:61f5:u
This binds the device to usb-storage instead of uas (according to dmesg) but
the error is still reported on removal.
I guess the fundamental question is whether this error is significant in any
way. If it's of no consequence then I'll happily ignore it and move on.
If on the other hand it' is something best fixed, please let me know how I
can assist with this.
The device is reported by lsusb as
Bus 004 Device 004: ID 04e8:61f5 Samsung Electronics Co., Ltd Portable SSD T5
The verbose lsusb output is included at the end of this post[1].
The "Synchronize Cache(10) failed" message is seen regardless of what USB
sockets the drive is connected to:
* Front panel USB2 [Intel Corporation 82801JI (ICH10 Family) USB2 EHCI]
* Rear panel USB2 [Intel Corporation 82801JI (ICH10 Family) USB2 EHCI]
* PCIe USB3 [ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller]
* PCIe USB-C [ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller]
The mainboard has no onboard USB3 or USB-C sockets. These are provided by
a PCIe card.
The Samsung T5 drive does not appear to be adversely affected by the error
report - I have not yet experienced any data loss.
I am seeing the same "Synchronize Cache(10) failed" on other machines
which have different hardware. I can dig the hardware details up if that
would be useful.
Regards
jonathan
[1] Samsung T5 "lsusb -v" output follows.
Bus 004 Device 004: ID 04e8:61f5 Samsung Electronics Co., Ltd Portable SSD T5
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x04e8 Samsung Electronics Co., Ltd
idProduct 0x61f5 Portable SSD T5
bcdDevice 1.00
iManufacturer 2 Samsung
iProduct 3 Portable SSD T5
iSerial 1 1234568370EF
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0079
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 896mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 4
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 98
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
MaxStreams 32
Data-in pipe (0x03)
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
MaxStreams 32
Data-out pipe (0x04)
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 15
MaxStreams 32
Status pipe (0x02)
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Command pipe (0x01)
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 0x002a
bNumDeviceCaps 3
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x0000f41e
BESL Link Power Management (LPM) Supported
BESL value 1024 us
Deep BESL value 61440 us
SuperSpeed USB Device Capability:
bLength 10
bDescriptorType 16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000e
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 10 micro seconds
bU2DevExitLat 2047 micro seconds
SuperSpeedPlus USB Device Capability:
bLength 20
bDescriptorType 16
bDevCapabilityType 10
bmAttributes 0x00000001
Sublink Speed Attribute count 1
Sublink Speed ID count 0
wFunctionalitySupport 0x1100
bmSublinkSpeedAttr[0] 0x000a4030
Speed Attribute ID: 0 10Gb/s Symmetric RX SuperSpeedPlus
bmSublinkSpeedAttr[1] 0x000a40b0
Speed Attribute ID: 0 10Gb/s Symmetric TX SuperSpeedPlus
Device Status: 0x0000
(Bus Powered)
