On Sun, Sep 11, 2016 at 10:54 PM, Duncan <1i5t5.dun...@cox.net> wrote:
> On the bright side, the double-whammy of being under such tight > filesystem size constraints, coupled with finding out you have less than > half the space of the filesystem actually available due to default-mixed- > mode AND default dup-metadata (thus dup everything), I'm not following what you mean by default dup everything. You mean that's how it used to work? Because on a real USB stick, 2GiB: [chris@f24m ~]$ mkfs.btrfs -M /dev/sdb btrfs-progs v4.7.2 See http://btrfs.wiki.kernel.org for more information. probe of /dev/sdb failed, cannot detect existing filesystem. ERROR: use the -f option to force overwrite of /dev/sdb [chris@f24m ~]$ sudo mkfs.btrfs -M /dev/sdb btrfs-progs v4.7.2 See http://btrfs.wiki.kernel.org for more information. Label: (null) UUID: 237d8ab9-b22f-435c-bbd8-2117afa1760c Node size: 4096 Sector size: 4096 Filesystem size: 1.87GiB Block group profiles: Data+Metadata: single 8.00MiB System: single 4.00MiB SSD detected: no Incompat features: mixed-bg, extref, skinny-metadata Number of devices: 1 Devices: ID SIZE PATH 1 1.87GiB /dev/sdb Whereas without the -M [chris@f24m ~]$ sudo mkfs.btrfs -f /dev/sdb [sudo] password for chris: btrfs-progs v4.7.2 See http://btrfs.wiki.kernel.org for more information. Label: (null) UUID: a7c79550-10b8-4a4c-9b23-9c9110e30121 Node size: 16384 Sector size: 4096 Filesystem size: 1.87GiB Block group profiles: Data: single 8.00MiB Metadata: DUP 95.56MiB System: DUP 8.00MiB SSD detected: no Incompat features: extref, skinny-metadata Number of devices: 1 Devices: ID SIZE PATH 1 1.87GiB /dev/sdb So with -M, it's single by default.. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
