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Remove blade SSD from iMac

I believe the blade SSD on my 2017 27-inch Fusion Drive iMac is faulty. The issues I get are extremely slow boot up and shut downs when it freezes up. I ran EtreCheck and it said the SSD was very slow. I was told on the Apple forums the error reports point to the storage for the reason for the kernel panics.

I now run macOS on an external spinning HDD and I have to eject the old Macintosh HDD from Finder which definitely does help but still occasionally get the issues above.

After seeing the steps on ifixit, I plan on replacing the internal HDD with a 4TB Crucial SSD and remove the blade SSD entirely and not replace it. My question is, will my iMac still function without this blade SSD and instead run entirely on the 4TB Crucial SSD??

Update (05/18/2022)

DriveDX output

SYSTEM INFORMATION

  • Report Timestamp : 19 May 2022 5:23:00 am AEST
  • Report Timestamp (ISO 8601 format) : 2022-05-19T05:23:00
  • Application Name : DriveDx
  • Application Version : 1.11.0.730
  • Application SubBuild : 0
  • Application Edition : Standalone
  • Application Website : https://binaryfruit.com/drivedx
  • DriveDx Knowledge Base Revision : 101/101
  • Computer Name : iMac
  • Host Name : iMac
  • Computer Model : iMac18,3
  • OS Boot Time : 2022-05-18T22:24:25
  • Time Since Boot : 06h 58m 35s
  • OS Name : macOS
  • OS Version : 10.16.0
  • OS Build : 21E258
  • OS Kernel Version : Darwin 21.4.0
  • SAT SMART Driver Version : N/A
  • ATA Command Support Tolerance : verypermissive

Number of drives in report : 1

DRIVE 1 OF 1

  • Last Checked : 19 May 2022 5:13:59 am AEST
  • Last Checked (ISO 8601 format) : 2022-05-19T05:13:59
  • Advanced SMART Status : FAILED
  • Overall Health Rating : N/A 63.2%
  • Overall Performance Rating : AVERAGE 63.2%
  • Issues found : 6
  • Serial Number : ZA50CDG3
  • WWN Id : 5 000c50 0a2f5c13f
  • Volumes :
  • Device Path : /dev/disk5
  • Total Capacity : 3.0 TB (3,000,592,982,016 Bytes)
  • Model Family : Apple (Seagate-based) HDDs
  • Model : APPLE HDD ST3000DM001
  • Form Factor : 3.5 inches
  • Firmware Version : AQ03
  • Drive Type : HDD 7200 rpm
  • Power On Time : 21,893 hours (30 months 12 days 5 hours)
  • Power Cycles Count : 43,955
  • Current Power Cycle Time : 7.0 hours

DEVICE CAPABILITIES

  • S.M.A.R.T. support enabled : yes
  • DriveDx Active Diagnostic Config : Apple (Seagate-based) HDDs config [hdd.seagate.apple]
  • Sector Logical Size : 512
  • Sector Physical Size : 4096
  • Physical Interconnect : SATA
  • Logical Protocol : SATA
  • Removable : no
  • Ejectable : no
  • ATA Version : ACS-2, ACS-3 T13/2161-D revision 3b
  • SATA Version : SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
  • I/O Path : IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@17/AppleIntelPchSeriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice
  • Attributes Data Structure Revision : 10
  • SMART Command Transport (SCT) flags : 0x10bd
  • SCT Status supported : yes
  • SCT Feature Control supported : yes
  • SCT Data Table supported : yes
  • Error logging capabilities : 0x1
  • Self-tests supported : yes
  • Offline Data Collection capabilities : 0x73
  • Offline Data Collection status : 0x0
  • Auto Offline Data Collection flags : 0x0
  • [Known device ]: yes
  • [Drive State Flags ]: 0x44400300
  • [Last State Change Timestamp ]: 2022-05-19T05:14:00
  • [Last State Change Flags ]: 0x44400300
  • [Last State Change Diff Flags ]: 0x1
  • Last Email Report Timestamp : 2022-05-19T05:14:00
  • Last Email Report Reason Flags : 0x44400300
  • Last Email Report State Change Flags : 0x1

CURRENT POWER CYCLE STATISTICS

  • Time since computer startup : 6 hours
  • Data Read : 334,428,672 bytes (334.4 MB)
  • Data Written : 87,269,376 bytes (87.3 MB)
  • Data Read/Write Ratio : 3.83
  • Data Read/hour : 47.9 MB/hour
  • Data Write/hour : 12.5 MB/hour
  • Operations (Read) : 14,024
  • Read IOPS : 1
  • Operations (Write) : 1,913
  • Write IOPS : 0
  • Operations Read/Write Ratio : 7
  • Throughput per operation (Read) : 23.8 KB/Op
  • Throughput per operation (Write) : 45.6 KB/Op
  • Latency Time (Read) : 0 ns
  • Latency Time (Write) : 0 ns
  • Retries (Read) : 0
  • Retries (Write) : 0
  • Errors (Read) : 23
  • Errors (Write) : 0

PROBLEMS SUMMARY

  • Failed Indicators (life-span / pre-fail) : 1 (1 / 0)
  • Failing Indicators (life-span / pre-fail) : 3 (3 / 0)
  • Warnings (life-span / pre-fail) : 1 (1 / 0)
  • Recently failed Self-tests (Short / Full) : 0 (0 / 0)
  • I/O Error Count : 23 (23 / 0)
  • Time in Under temperature : 0 minutes
  • Time in Over temperature : 0 minutes

IMPORTANT HEALTH INDICATORS

  • ID NAME RAW VALUE STATUS
  • 5 Reallocated Sector Count 0xEF50 75.0% OK
  • 187 Reported Uncorrectable Errors 65,535 1.0% Failing
  • 197 Current Pending Sector Count 5,256 68.0% Failing
  • 198 Offline Uncorrectable Sector Count 5,256 68.0% Failing
  • 199 UDMA CRC Error Count 0 100% OK
  • 241 Total LBAs Written 74,589,541,612 (38.2 TB) 100% OK

TEMPERATURE INFORMATION (CELSIUS)

  • Current Temperature : 29
  • Power Cycle Min Temperature : 29
  • Power Cycle Max Temperature : 29
  • Lifetime Min Temperature : 10
  • Lifetime Max Temperature : 54
  • Recommended Min Temperature : 3
  • Recommended Max Temperature : 62
  • Temperature Min Limit : 0
  • Temperature Max Limit : 65

DRIVE HEALTH INDICATORS

  • ID | NAME | TYPE | UPDATE | RAW VALUE | VALUE | THRESHOLD | WORST | LAST MODIFIED | STATUS
  • 1 Raw Read Error Rate Pre-fail online 0x70D52ED 78 6 73 19/5/2022 5:13 am 63.2% OK
  • 3 Spin Up Time Pre-fail online 0 94 0 94 19/5/2022 5:13 am 94.0% OK
  • 4 Start Stop Count Life-span online 31,957 69 20 69 19/5/2022 5:13 am 61.3% OK
  • 5 Reallocated Sector Count Pre-fail online 0xEF50 84 36 51 19/5/2022 5:13 am 75.0% OK
  • 7 Seek Error Rate Pre-fail online 0x19986DFB 86 30 60 19/5/2022 5:13 am 100% OK
  • 9 Power On Hours Life-span online 21,893 76 0 76 19/5/2022 5:13 am 76.0% OK
  • 10 Spin Retry Count Pre-fail online 0 100 97 100 19/5/2022 5:13 am 100% OK
  • 12 Power Cycle Count Life-span online 43,955 58 20 58 19/5/2022 5:13 am 47.5% OK
  • 184 End-to-End Error Life-span online 8 92 99 92 19/5/2022 5:13 am 0% Failed
  • 187 Reported Uncorrectable Errors Life-span online 65,535 1 0 1 19/5/2022 5:13 am 1.0% Failing
  • 188 Command Timeout Life-span online 321 99 0 67 19/5/2022 5:13 am 99.0% Warning
  • 189 High Fly Writes Life-span online 31 69 0 69 19/5/2022 5:13 am 100% OK
  • 190 Airflow Temperature Celsius Life-span online 29 71 45 46 19/5/2022 5:13 am 47.3% OK
  • 191 G-Sense Error Rate Life-span online 0 100 0 100 19/5/2022 5:13 am 100% OK
  • 192 Power-Off Retract Count Life-span online 415 100 0 100 19/5/2022 5:13 am 100% OK
  • 193 Load Cycle Count Life-span online 44,019 78 0 78 19/5/2022 5:13 am 78.0% OK
  • 194 Temperature (Celsius) Life-span online 29 71 35 46 19/5/2022 5:13 am 55.4% OK
  • 197 Current Pending Sector Count Life-span online 5,256 68 0 1 19/5/2022 5:13 am 68.0% Failing
  • 198 Offline Uncorrectable Sector Count Life-span offline 5,256 68 0 1 19/5/2022 5:13 am 68.0% Failing
  • 199 UDMA CRC Error Count Life-span online 0 200 0 200 19/5/2022 5:13 am 100% OK
  • 240 Head Flying Hours Life-span offline 25,484 100 0 253 19/5/2022 5:13 am 100% OK
  • 241 Total LBAs Written Life-span offline 74,589,541,612 (38.2 TB) 100 0 253 19/5/2022 5:13 am 100% OK
  • 242 Total LBAs Read Life-span offline 4,406,628,187,644 (2.3 PB) 100 0 253 19/5/2022 5:13 am 100% OK

DRIVE ERROR LOG

  • # | TIME OCCURRED | ERRORS | PRIOR COMMAND
  • 5 21892 hours UNKNOWN ERROR READ FPDMA QUEUED
  • 4 21892 hours UNKNOWN ERROR READ FPDMA QUEUED
  • 3 21892 hours UNKNOWN ERROR READ FPDMA QUEUED
  • 2 21892 hours UNKNOWN ERROR READ FPDMA QUEUED
  • 1 21892 hours UNC READ DMA EXT

DRIVE SELF-TEST LOG

self-test log is empty

SYSTEM INFORMATION

  • Report Timestamp : 19 May 2022 5:22:50 am AEST
  • Report Timestamp (ISO 8601 format) : 2022-05-19T05:22:50
  • Application Name : DriveDx
  • Application Version : 1.11.0.730
  • Application SubBuild : 0
  • Application Edition : Standalone
  • Application Website : https://binaryfruit.com/drivedx
  • DriveDx Knowledge Base Revision : 101/101
  • Computer Name : iMac
  • Host Name : iMac
  • Computer Model : iMac18,3
  • OS Boot Time : 2022-05-18T22:24:25
  • Time Since Boot : 06h 58m 25s
  • OS Name : macOS
  • OS Version : 10.16.0
  • OS Build : 21E258
  • OS Kernel Version : Darwin 21.4.0
  • SAT SMART Driver Version : N/A
  • ATA Command Support Tolerance : verypermissive

Number of drives in report : 1

DRIVE 1 OF 1

  • Last Checked : 19 May 2022 5:13:59 am AEST
  • Last Checked (ISO 8601 format) : 2022-05-19T05:13:59
  • Advanced SMART Status : OK
  • Overall Health Rating : GOOD 100%
  • SSD Lifetime Left Indicator : AVERAGE 50.0%
  • Issues found : 0
  • Serial Number : S3CWNY0J221876
  • WWN Id :
  • Volumes :
  • Device Path : /dev/disk0
  • Total Capacity : 121.3 GB (121,332,826,112 Bytes)
  • Model Family : Apple/Samsung NVMe L-series SSD
  • Model : APPLE SSD SM0128L
  • Firmware Version : CXS7CA0Q
  • Drive Type : SSD
  • Power On Time : 4,972 hours (6 months 27 days 4 hours)
  • Power Cycles Count : 29,497
  • Current Power Cycle Time : 7.0 hours

DEVICE CAPABILITIES

  • S.M.A.R.T. support enabled : yes
  • DriveDx Active Diagnostic Config : Apple/Samsung NVMe SSD L-series config [ssd.nvme.apple.sm.l]
  • Sector Logical Size : 4096
  • Sector Physical Size : 4096
  • Physical Interconnect : PCI-Express (PCIe)
  • Logical Protocol : NVM-Express (NVMe)
  • Removable : no
  • Ejectable : no
  • NVMe Revision Supported : 1.10
  • PCI Vendor Id : 0x144d
  • Thermal Throttling Supported : no
  • Volatile Write Cache Supported : yes
  • Maximum Data Transfer Size : 256 Pages
  • Log Page Attributes : 0x0
  • Format NVM Attributes : 0x3
  • Optional Admin Command Support : 0x0
  • Optional NVM Command Support : 0x1f (Compare, Wr_Unc, DS_Mngmt, Wr_Zero, Save/Sel_Feat)
  • Number of Power States Supported : 2
  • Error Log Page Entries : 63
  • Keep Alive Support : 0
  • Total NVMe Capacity : -
  • Unallocated NVMe Capacity : -
  • Number of NVMe Namespaces : 1
  • I/O Path : IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/RP17@1B/IOPP/SSD0@0/IONVMeController/IONVMeBlockStorageDevice@1
  • [Known device ]: yes
  • [Drive State Flags ]: 0x0

CURRENT POWER CYCLE STATISTICS

  • Time since computer startup : 6 hours
  • Data Read : 653,848,576 bytes (653.8 MB)
  • Data Written : 92,028,928 bytes (92.0 MB)
  • Data Read/Write Ratio : 7.10
  • Data Read/hour : 93.8 MB/hour
  • Data Write/hour : 13.2 MB/hour
  • Operations (Read) : 138,798
  • Read IOPS : 3,972
  • Operations (Write) : 4,918
  • Write IOPS : 141
  • Operations Read/Write Ratio : 28
  • Throughput per operation (Read) : 4.7 KB/Op
  • Throughput per operation (Write) : 18.7 KB/Op
  • Latency Time (Read) : 0 ns
  • Latency Time (Write) : 0 ns
  • Retries (Read) : 0
  • Retries (Write) : 0
  • Errors (Read) : 0
  • Errors (Write) : 0

PROBLEMS SUMMARY

  • Failed Indicators (life-span / pre-fail) : 0 (0 / 0)
  • Failing Indicators (life-span / pre-fail) : 0 (0 / 0)
  • Warnings (life-span / pre-fail) : 0 (0 / 0)
  • I/O Error Count : 0 (0 / 0)

IMPORTANT HEALTH INDICATORS

  • ID NAME RAW VALUE STATUS
  • 7 Data Units Written 129,418,339 (66.3 TB) 100% OK
  • 14 Media and Data Integrity Errors 0 100% OK

TEMPERATURE INFORMATION (CELSIUS)

  • Current Temperature : 36
  • Power Cycle Min Temperature : 36
  • Power Cycle Max Temperature : 36
  • Lifetime Min Temperature : 36
  • Lifetime Max Temperature : 36
  • Recommended Min Temperature : 5
  • Recommended Max Temperature : 65
  • Temperature Min Limit : 5
  • Temperature Max Limit : 70

DRIVE HEALTH INDICATORS

  • ID | NAME | TYPE | UPDATE | RAW VALUE | VALUE | THRESHOLD | WORST | LAST MODIFIED | STATUS
  • 2 Composite Temperature Life-span online 36 (36 °C) 64 30 64 19/5/2022 5:13 am 48.6% OK
  • 3 Available Spare Pre-fail online 100 100 10 100 19/5/2022 5:13 am 100% OK
  • 5 Life Percentage Used Life-span online 50 50 0 50 19/5/2022 5:13 am 50.0% OK
  • 6 Data Units Read Life-span online 138,869,905 (71.1 TB) 100 0 100 19/5/2022 5:13 am 100% OK
  • 7 Data Units Written Life-span online 129,418,339 (66.3 TB) 100 0 100 19/5/2022 5:13 am 100% OK
  • 8 Host Read Commands Life-span online 3,645,024,451 100 0 100 19/5/2022 5:13 am 100% OK
  • 9 Host Write Commands Life-span online 4,088,558,941 100 0 100 19/5/2022 5:13 am 100% OK
  • 10 Controller Busy Time Life-span online 14,519 (14,519 minutes) 100 0 100 19/5/2022 5:13 am 100% OK
  • 11 Power Cycles Life-span online 29,497 100 0 100 19/5/2022 5:13 am 100% OK
  • 12 Power On Hours Life-span online 4,972 (4,972 hours) 100 0 100 19/5/2022 5:13 am 100% OK
  • 13 Unsafe Shutdowns Life-span online 223 100 0 100 19/5/2022 5:13 am 100% OK
  • 14 Media and Data Integrity Errors Pre-fail online 0 100 0 100 19/5/2022 5:13 am 100% OK
  • 15 Error Information Log Entries Pre-fail online 0 100 0 100 19/5/2022 5:13 am 100% OK
  • 16 Warning Composite Temperature Time Life-span online 0 (0 minutes) 100 0 100 19/5/2022 5:13 am 100% OK
  • 17 Critical Composite Temperature Time Life-span online 0 (0 minutes) 100 0 100 19/5/2022 5:13 am 100% OK

DRIVE ERROR LOG

error log is empty

Répondre à cette question J'ai le même problème

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Yes! You don't need the Fusion blade SSD in your system.

The easiest way is after backing up your stuff using your external drive (booting up under it reformat each drive that should make it clear which drive is having problems. You could also check the blade SSD using a tool like DriveDX which lets you see the SSD's health.

You don't need to take it out once it's deactivated when you put in the new SATA SSD drive.

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I ran a test using DriveDX and it turns out its the HDD that has failed, not the blade SSD as I originally thought - can you please confirm that for me. Even though the Etrecheck said the "SDD was slow".

In any event im going to replace the HDD with an SSD.

par

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erahi sera éternellement reconnaissant.
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