@sNullp
```
--fastFormat [fast format mode] (SAS Only) (SBC4 required)
Use this option with the --formatUnit option
to run a fast format.
Changing sector sizes is intended for supported Seagate products
used in some hardware RAID configurations. Please consult your
hardware RAID documentation for information about compatibility and
using 4K native sectors before using this option!
Software RAID or individual/JBOD drive solutions will see no benefit as modern
file systems and modern operating systems are already 4K aware even on
512 emulation drives. Modern operating systems already align file systems to 4K
boundaries required by these drives for optimal performance.
Performing a sector size change is data destructive and has a risk that
the adapter, driver, or operating system may not know how to communicate with
the device once this has completed.
There is an additional risk when performing a low-level fast format that may
make the drive inoperable if it is reset at any time while it is formatting.
Available fast format modes:
0 - This is a standard format unit command. All logical
blocks will be overwritten. This command will take a
very long time
1 - This is a fast format unit command keeping existing
data in physical sector. This option can be used to
quickly change the the logical sector size between
5xxe and 4xxx. The media may be readable, but data
may be unspecified or may return errors on read access
according to it's error processing algorithms.
2 - This is a fast format unit command that can change the
logical sector size quickly. Media may or may not be
read accessible until a write has been performed to
the media.
WARNING: Any interruption to the device while it is formatting may render the
drive inoperable! Use this at your own risk!
WARNING: Set sector size may affect all LUNs/namespaces for devices
with multiple logical units or namespaces.
WARNING: Disable any out-of-band management systems/services/daemons
before using this option. Interruptions can be caused by these
and may prevent completion of a sector size change.
WARNING: It is recommended that this operation is done from a bootable environment
(Live USB) to reduce the risk of OS background activities running and
triggering a device reset while reformating the drive.
```
这是 fastFormat 的注释，的确 fastFormat 没有执行清除，但看起来能够完全保留数据也不是期待的结构
