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Full Discussion: Opening up ZFS pool as writable
Top Forums UNIX for Beginners Questions & Answers Opening up ZFS pool as writable Post 303035461 by alphatron150 on Friday 24th of May 2019 05:46:25 PM
Old 05-24-2019
Opening up ZFS pool as writable
I have installed FreeBSD onto a raw image file using QEMU Emulator successfully. I have formatted the image file using the ZFS file system (ZFS POOL).
Using the following commands below I have successfully mounted the image file ready to be opened by zpool
Code:
sudo losetup /dev/loop0 [path-to-file].img sudo kpartx -l /dev/loop0 sudo kpartx -av /dev/loop0

However with the next command show below....
Code:
sudo zpool import -R [MOUNT-PATH] -d /dev/mapper

I get the following error message
Code:
The pool can only be accessed in read-only mode on this system. It     cannot be accessed in read-write mode because it uses the following     feature(s) not supported on this system:     com.delphix:spacemap_v2 (Space maps representing large segments are more efficient.) The pool cannot be imported in read-write mode. Import the pool with     "-o readonly=on", access the pool on a system that supports the     required feature(s), or recreate the pool from backup.

I cannot find anywhere online about the feature called 'spacemap_v2'. How do I install this or how do I mount my zfs pool to be writable. I know I can mount it as read-only but that defeats the purpose of what I want to do as I want to be able to write data to copy/paste data in its mountable platform interface.
Does anyone know how to achieve this. I shall be grateful for a response.
Regards
 

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LEARN ABOUT CENTOS

grub2-fstest

GRUB-FSTEST(3)						     Library Functions Manual						    GRUB-FSTEST(3)

NAME

       grub-fstest -- Debug tool for GRUB's filesystem driver.

SYNOPSIS

       grub-fstest [-c | --diskcount=NUM] [-C | --crypto]
		    [-d | --debug=STRING] [-K | --zfs-key=FILE|prompt]
		    [-n | --length=NUM] [-r | --root=DEVICE_NAME]
		    [-s | --skip=NUM] [-u | --uncompress] [-v | --verbose]
		    IMAGE_PATH <blocklist FILE | cat FILE |
		    cmp FILE LOCAL | cp FILE LOCAL | crc FILE |
		    hex FILE | ls PATH | xnu_uuid DEVICE>

DESCRIPTION

       grub-fstest is a tool for testing GRUB's filesystem drivers.  You should not normally need to run this program.

OPTIONS

       --diskcount=NUM
	      Specify the number of input files.

       --crypto
	      Mount cryptographic devices.

       --debug=STRING
	      Set debug environment variable.

       --zfs-key=FILE|prompt
	      Load ZFS cryptographic key.

       --length=NUM
	      Handle NUM bytes in output file.

       --root=DEVICE_NAME
	      Set root device.

       --skip=NUM
	      Skip NUM bytes from output file.

       --uncompress
	      Uncompress data.

       --verbose
	      Print verbose messages.

COMMANDS

       blocklist FILE
	      Display block list of FILE.

       cat FILE
	      Display FILE on standard output.

       cmp FILE LOCAL
	      Compare FILE with local file LOCAL.

       cp FILE LOCAL
	      Copy FILE to local file LOCAL.

       crc FILE
	      Display the CRC-32 checksum of FILE.

       hex FILE
	      Display contents of FILE in hexidecimal.

       ls PATH
	      List files at PATH.

       xnu_uuid DEVICE
	      Display the XNU UUID of DEVICE.

SEE ALSO

       info grub

								  Wed Feb 26 2014						    GRUB-FSTEST(3)
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