Comments (2)
sorry for the delay in replying to your question. I created few paragraphs describing FastFormat which I will be adding to the user guides. I hope I covered the topic well enough to answer your questions. If not, please to let me know what needs to be addressed. Thanks so much for your comments!
Here is the new section:
About FastFormat
A FastFormat (quickly changing the logical sector size) may take a few minutes for the process to complete. The disk activity LED may show activity during the conversion. The larger the drive, the longer it takes. This feature is found on SAS and SATA interface Seagate drive families designed and manufactured later than 2016. SAS interface drives will report support for FastFormat if it is available in the drive. Just run the -i or --deviceInfo command and check under the Features Supported section. Unfortunately, SATA interface drives do not report this capability. Please refer to the SATA product manual for verification of this feature.
SAS and SATA interface drives accomplish a FastFormat this with the --setSectorSize [new sector size] command found in SeaChest_Format or SeaChest_Lite. In addition, for SAS interface drives, only, the same result is possible using the --formatUnit command with the --fastFormat [fast format mode] modifier equal to 1. This command is found in SeaChest_Format and SeaChest_Erase. For example:
--formatUnit 4096 --fastFormat 1 --confirm I-... etc
SAS interface drives, only, can all do a long format unit. This procedure takes a very long time, more than a day in some cases, but it does have the advantage of full defect management with all sectors being readable at the conclusion. The fast format does not do this full drive read and verification. If your drive is new, there is no real need to run a long format unit to change sector between 5xxE (512 bytes per logical sector emulation) and 4kN (4096 native bytes per sector, logical and physical).
NOTE: Operating systems do a device discovery during start up and set various parameters, like total sectors and sector size, into the storage device descriptions. The logical sector size times the number or logical sectors defines the drive capacity. You should expect to see OS I/O errors if you change the logical sector size on a drive and then perform read or write operations before the OS has updated its storage device descriptions. Some operating systems will throw an error after accessing a drive that has just run a FastFormat but during its error recovery routines it may re-discover the device parameters and update the system logs. A system restart, however, is the most reliable way to refresh the storage device descriptions.
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Related Issues (20)
- SeaChest should warn the user that setSectorSize on USB External Hard is unsupported and could brick the drive HOT 3
- Not an NVMe device, Skipping HOT 12
- SeaChest_Lite_120_11923_64.exe: unknown option -- showSupportedSectorSizes HOT 2
- broken HDD drive after changing to 4kn HOT 22
- SeaChest_NVMe Reporting incorrect data for XPG Spectrix HOT 7
- FormatUnit has no effect HOT 6
- FormatUnit fails HOT 13
- seagateQuickFormat expected run time HOT 10
- please make it visible that --confirm this-will-erase-data does not really erase data HOT 4
- SeaChest_Lite does not "see" any Exos ST16000NM001G connected to an Adaptec 71605 or 71605E. HOT 4
- Please add "--json" option to output as json for ease of parsing output HOT 1
- Helps and docs don't explain how to pass a [range] HOT 3
- SeaChest-lite SetSectorSize does nothing HOT 6
- Format unit failing with Format Unit Not Supported HOT 1
- Failed to set sector size! HOT 1
- Firmware update failing - Firmware Download Failed - Download Microcode returning: ABORTED
- Seagate FireCuda 530 - Error: IDD is only supported on Seagate Drives. HOT 2
- format error - SeaChest_Release_3.5.2_03-29-2023__15-05-29.usbBootMaker HOT 5
- openSeaChest binaries don't run HOT 5
- Cannot change logical sector size of SATA-connected Seagate: "Setting sector size not supported on this device" HOT 5
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