Checking the health of an eMMC drive

Lysander666 · 03-03-2019, 06:07 AM

Apparently smartmontools doesn't work with eMMC cards, however there is mmc-utils. This is what it gives me for /dev/mmcblk0

Code:

lysander@xanadu-ix:~$ sudo mmc extcsd read /dev/mmcblk0
[sudo] password for lysander: 
=============================================
  Extended CSD rev 1.7 (MMC 5.0)
=============================================

Card Supported Command sets [S_CMD_SET: 0x01]
HPI Features [HPI_FEATURE: 0x01]: implementation based on CMD13
Background operations support [BKOPS_SUPPORT: 0x01]
Max Packet Read Cmd [MAX_PACKED_READS: 0x3f]
Max Packet Write Cmd [MAX_PACKED_WRITES: 0x3f]
Data TAG support [DATA_TAG_SUPPORT: 0x01]
Data TAG Unit Size [TAG_UNIT_SIZE: 0x03]
Tag Resources Size [TAG_RES_SIZE: 0x00]
Context Management Capabilities [CONTEXT_CAPABILITIES: 0x7f]
Large Unit Size [LARGE_UNIT_SIZE_M1: 0x00]
Extended partition attribute support [EXT_SUPPORT: 0x03]
Generic CMD6 Timer [GENERIC_CMD6_TIME: 0x05]
Power off notification [POWER_OFF_LONG_TIME: 0x32]
Cache Size [CACHE_SIZE] is 4096 KiB
Background operations status [BKOPS_STATUS: 0x00]
1st Initialisation Time after programmed sector [INI_TIMEOUT_AP: 0x1e]
Power class for 52MHz, DDR at 3.6V [PWR_CL_DDR_52_360: 0x44]
Power class for 52MHz, DDR at 1.95V [PWR_CL_DDR_52_195: 0xaa]
Power class for 200MHz at 3.6V [PWR_CL_200_360: 0xbb]
Power class for 200MHz, at 1.95V [PWR_CL_200_195: 0xbb]
Minimum Performance for 8bit at 52MHz in DDR mode:
 [MIN_PERF_DDR_W_8_52: 0x0a]
 [MIN_PERF_DDR_R_8_52: 0x50]
TRIM Multiplier [TRIM_MULT: 0x01]
Secure Feature support [SEC_FEATURE_SUPPORT: 0x55]
Boot Information [BOOT_INFO: 0x07]
 Device supports alternative boot method
 Device supports dual data rate during boot
 Device supports high speed timing during boot
Boot partition size [BOOT_SIZE_MULTI: 0x20]
Access size [ACC_SIZE: 0x08]
High-capacity erase unit size [HC_ERASE_GRP_SIZE: 0x08]
 i.e. 4096 KiB
High-capacity erase timeout [ERASE_TIMEOUT_MULT: 0x08]
Reliable write sector count [REL_WR_SEC_C: 0x01]
High-capacity W protect group size [HC_WP_GRP_SIZE: 0x02]
 i.e. 8192 KiB
Sleep current (VCC) [S_C_VCC: 0x07]
Sleep current (VCCQ) [S_C_VCCQ: 0x0a]
Sleep/awake timeout [S_A_TIMEOUT: 0x11]
Sector Count [SEC_COUNT: 0x01d5a000]
 Device is block-addressed
Minimum Write Performance for 8bit:
 [MIN_PERF_W_8_52: 0x14]
 [MIN_PERF_R_8_52: 0x64]
 [MIN_PERF_W_8_26_4_52: 0x0f]
 [MIN_PERF_R_8_26_4_52: 0x3c]
Minimum Write Performance for 4bit:
 [MIN_PERF_W_4_26: 0x0f]
 [MIN_PERF_R_4_26: 0x1e]
Power classes registers:
 [PWR_CL_26_360: 0x33]
 [PWR_CL_52_360: 0x33]
 [PWR_CL_26_195: 0xaa]
 [PWR_CL_52_195: 0xaa]
Partition switching timing [PARTITION_SWITCH_TIME: 0x01]
Out-of-interrupt busy timing [OUT_OF_INTERRUPT_TIME: 0x0a]
I/O Driver Strength [DRIVER_STRENGTH: 0x1f]
Card Type [CARD_TYPE: 0x57]
 HS200 Single Data Rate eMMC @200MHz 1.8VI/O
 HS Dual Data Rate eMMC @52MHz 1.8V or 3VI/O
 HS eMMC @52MHz - at rated device voltage(s)
 HS eMMC @26MHz - at rated device voltage(s)
CSD structure version [CSD_STRUCTURE: 0x02]
Command set [CMD_SET: 0x00]
Command set revision [CMD_SET_REV: 0x00]
Power class [POWER_CLASS: 0x0b]
High-speed interface timing [HS_TIMING: 0x02]
Erased memory content [ERASED_MEM_CONT: 0x00]
Boot configuration bytes [PARTITION_CONFIG: 0x00]
 Not boot enable
 No access to boot partition
Boot config protection [BOOT_CONFIG_PROT: 0x00]
Boot bus Conditions [BOOT_BUS_CONDITIONS: 0x00]
High-density erase group definition [ERASE_GROUP_DEF: 0x01]
Boot write protection status registers [BOOT_WP_STATUS]: 0x00
Boot Area Write protection [BOOT_WP]: 0x00
 Power ro locking: possible
 Permanent ro locking: possible
 ro lock status: not locked
User area write protection register [USER_WP]: 0x00
FW configuration [FW_CONFIG]: 0x00
RPMB Size [RPMB_SIZE_MULT]: 0x20
Write reliability setting register [WR_REL_SET]: 0x1f
 user area: the device protects existing data if a power failure occurs during a write operation
 partition 1: the device protects existing data if a power failure occurs during a write operation
 partition 2: the device protects existing data if a power failure occurs during a write operation
 partition 3: the device protects existing data if a power failure occurs during a write operation
 partition 4: the device protects existing data if a power failure occurs during a write operation
Write reliability parameter register [WR_REL_PARAM]: 0x05
 Device supports writing EXT_CSD_WR_REL_SET
 Device supports the enhanced def. of reliable write
Enable background operations handshake [BKOPS_EN]: 0x00
H/W reset function [RST_N_FUNCTION]: 0x00
HPI management [HPI_MGMT]: 0x01
Partitioning Support [PARTITIONING_SUPPORT]: 0x07
 Device support partitioning feature
 Device can have enhanced tech.
Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x0003ac
 i.e. 7700480 KiB
Partitions attribute [PARTITIONS_ATTRIBUTE]: 0x00
Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00
 Device partition setting NOT complete
General Purpose Partition Size
 [GP_SIZE_MULT_4]: 0x000000
 [GP_SIZE_MULT_3]: 0x000000
 [GP_SIZE_MULT_2]: 0x000000
 [GP_SIZE_MULT_1]: 0x000000
Enhanced User Data Area Size [ENH_SIZE_MULT]: 0x000000
 i.e. 0 KiB
Enhanced User Data Start Address [ENH_START_ADDR]: 0x000000
 i.e. 0 bytes offset
Bad Block Management mode [SEC_BAD_BLK_MGMNT]: 0x00
Periodic Wake-up [PERIODIC_WAKEUP]: 0x00
Program CID/CSD in DDR mode support [PROGRAM_CID_CSD_DDR_SUPPORT]: 0x01
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[127]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[126]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[125]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[124]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[123]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[122]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[121]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[120]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[119]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[118]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[117]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[116]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[115]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[114]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[113]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[112]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[111]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[110]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[109]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[108]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[107]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[106]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[105]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[104]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[103]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[102]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[101]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[100]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[99]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[98]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[97]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[96]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[95]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[94]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[93]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[92]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[91]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[90]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[89]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[88]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[87]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[86]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[85]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[84]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[83]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[82]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[81]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[80]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[79]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[78]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[77]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[76]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[75]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[74]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[73]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[72]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[71]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[70]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[69]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[68]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[67]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[66]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[65]]: 0x00
Vendor Specific Fields [VENDOR_SPECIFIC_FIELD[64]]: 0x00
Native sector size [NATIVE_SECTOR_SIZE]: 0x01
Sector size emulation [USE_NATIVE_SECTOR]: 0x00
Sector size [DATA_SECTOR_SIZE]: 0x00
1st initialization after disabling sector size emulation [INI_TIMEOUT_EMU]: 0x0a
Class 6 commands control [CLASS_6_CTRL]: 0x00
Number of addressed group to be Released[DYNCAP_NEEDED]: 0x00
Exception events control [EXCEPTION_EVENTS_CTRL]: 0x0000
Exception events status[EXCEPTION_EVENTS_STATUS]: 0x0000
Extended Partitions Attribute [EXT_PARTITIONS_ATTRIBUTE]: 0x0000
Context configuration [CONTEXT_CONF[51]]: 0x00
Context configuration [CONTEXT_CONF[50]]: 0x00
Context configuration [CONTEXT_CONF[49]]: 0x00
Context configuration [CONTEXT_CONF[48]]: 0x00
Context configuration [CONTEXT_CONF[47]]: 0x00
Context configuration [CONTEXT_CONF[46]]: 0x00
Context configuration [CONTEXT_CONF[45]]: 0x00
Context configuration [CONTEXT_CONF[44]]: 0x00
Context configuration [CONTEXT_CONF[43]]: 0x00
Context configuration [CONTEXT_CONF[42]]: 0x00
Context configuration [CONTEXT_CONF[41]]: 0x00
Context configuration [CONTEXT_CONF[40]]: 0x00
Context configuration [CONTEXT_CONF[39]]: 0x00
Context configuration [CONTEXT_CONF[38]]: 0x00
Context configuration [CONTEXT_CONF[37]]: 0x00
Packed command status [PACKED_COMMAND_STATUS]: 0x00
Packed command failure index [PACKED_FAILURE_INDEX]: 0x00
Power Off Notification [POWER_OFF_NOTIFICATION]: 0x01
Control to turn the Cache ON/OFF [CACHE_CTRL]: 0x01
eMMC Firmware Version: 
eMMC Life Time Estimation A [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x01
eMMC Life Time Estimation B [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x00
eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x01

There's little that's obvious to me there about health of the drive. Is there another tool I should use or a part of this data I should be paying attention to? There is always "life time estimation" but that doesn't seem to give me much.

Brains · 03-07-2019, 09:53 AM

Quote:

Originally Posted by Lysander666

Is there another tool I should use or a part of this data I should be paying attention to?

Out of curiosity, are you having any problems with it or just checking it's condition?
Did you install an OS recently?
Reason I ask, is because I forgot to record the read output on an eMMC drive I worked on, I only wrote stuff down by memory.
It seems to me there may be something off in your readout, but I could be wrong. It does however appear your readout shows the problem I encountered on someone else's tablet I fixed, just not sure as I didn't keep a copy of his before and after, just rough notes. The digit I highlighted, if the settings were actually set, that digit should be a "1". The third line suggests the same, that it's not set. I was not able to alter partitions (delete, create) in the user space which is the fourth partition of an eMMC, the first partition on his was RPMB, then two boot partitions and the fourth is the user space where you create a partition table and partitions for OS install.

Code:

Partitions attribute [PARTITIONS_ATTRIBUTE]: 0x00
Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00
 Device partition setting NOT complete

Lysander666 · 03-07-2019, 10:06 AM

Quote:

Originally Posted by Brains

Out of curiosity, are you having any problems with it or just checking it's condition?
Did you install an OS recently?

Yes to both. The other day I installed Xubuntu and a few hours after installing it I got a hard lockup. However, I put this down to the fact that I was running an out-of-date OS - Xubuntu 18.04 rather than 18.04.2, since I hadn't updated it yet [I was putting it off].

Quote:

Originally Posted by Brains

I was not able to alter partitions (delete, create) in the user space which is the fourth partition of an eMMC, the first partition on his was RPMB, then two boot partitions and the fourth is the user space where you create a partition table and partitions for OS install.

Creating and deleting partitions has not been a problem though - and I have /home as an SD card. It was the lockup that made me a bit suspicious, but I was running an OS that was 10 months out of date.

Brains · 03-07-2019, 10:26 AM

Quote:

Originally Posted by Lysander666

Yes to both. The other day I installed Xubuntu and a few hours after installing it I got a hard lockup. However, I put this down to the fact that I was running an out-of-date OS - Xubuntu 18.04 rather than 18.04.2, since I hadn't updated it yet [I was putting it off].

Creating and deleting partitions has not been a problem though - and I have /home as an SD card. It was the lockup that made me a bit suspicious, but I was running an OS that was 10 months out of date.

So you haven't installed anything after the lockup, just updated it. Because the lockup may have changed these settings I pointed out. Anyway, I'm gonna make a note of visiting buddy and I'll run a read on his now that's it's back to life and satisfy my curiosity, to see if those digits are still "0" or "1".

EDIT: It has to do with write reliability,

Quote:

Write reliability setting register [WR_REL_SET]: 0x1f
user area: the device protects existing data if a power failure occurs during a write operation