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rv:91.0) Gecko/20100101 Thunderbird/91.1.1 Subject: Re: seagate hm-smr issue Content-Language: en-US To: Jingyun He , linux-btrfs@vger.kernel.org, Naohiro Aota , Johannes Thumshirn References: From: Damien Le Moal Organization: Western Digital In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 2021/09/26 22:57, Jingyun He wrote: > Hello, > Btrfs works very well on WD/HGST disks, we got some Seagate HM-SMR > disks recently, model number is ST14000NM0428, > mkfs.btrfs works fine, and I can mount it, and push data into disk. > once we used up the capacity, and umount it. then we are unable to > re-mount it again. > The mount process will never end, the process just hangs there. > > Anybody can help me with this? +Naohiro and Johannes This is not a hang. Mount will just take a looooong time due to an inefficiency in how block groups are checked: a single zone report zone command is issued per block group, so with a disk almost full, that takes a long time (75000+zones checked one by one). Naohiro is working on a fix for this. > > Thanks. > -- Damien Le Moal Western Digital Research