From: Duncan <1i5t5.duncan@cox.net>
To: linux-btrfs@vger.kernel.org
Subject: Re: Btrfs/SSD
Date: Tue, 16 May 2017 04:48:39 +0000 (UTC) [thread overview]
Message-ID: <pan$7903c$57ad474c$640ec3d9$4cf73ffe@cox.net> (raw)
In-Reply-To: 20170515211206.29c5c132@jupiter.sol.kaishome.de
Kai Krakow posted on Mon, 15 May 2017 21:12:06 +0200 as excerpted:
> Am Mon, 15 May 2017 14:09:20 +0100
> schrieb Tomasz Kusmierz <tom.kusmierz@gmail.com>:
>>
>> Not true. When HDD uses 10% (10% is just for easy example) of space
>> as spare than aligment on disk is (US - used sector, SS - spare
>> sector, BS - bad sector)
>>
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>>
>> if failure occurs - drive actually shifts sectors up:
>>
>> US US US US US US US US US SS
>> US US US BS BS BS US US US US
>> US US US US US US US US US US
>> US US US US US US US US US US
>> US US US US US US US US US SS
>> US US US BS US US US US US US
>> US US US US US US US US US SS
>> US US US US US US US US US SS
>
> This makes sense... Reserve area somehow implies it is continuous and
> as such located at one far end of the platter. But your image totally
> makes sense.
Thanks Tomasz. It makes a lot of sense indeed, and had I thought about
it I think I already "knew" it, but I simply hadn't stopped to think about
it that hard, so you disabused me of the vague idea of spares all at one
end of the disk, too. =:^)
--
Duncan - List replies preferred. No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master." Richard Stallman
next prev parent reply other threads:[~2017-05-16 4:48 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-14 11:02 Btrfs/SSD Imran Geriskovan
2017-04-17 11:53 ` Btrfs/SSD Austin S. Hemmelgarn
2017-04-17 16:58 ` Btrfs/SSD Chris Murphy
2017-04-17 17:13 ` Btrfs/SSD Austin S. Hemmelgarn
2017-04-17 18:24 ` Btrfs/SSD Roman Mamedov
2017-04-17 19:22 ` Btrfs/SSD Imran Geriskovan
2017-04-17 22:55 ` Btrfs/SSD Hans van Kranenburg
2017-04-19 18:10 ` Btrfs/SSD Chris Murphy
2017-04-18 12:26 ` Btrfs/SSD Austin S. Hemmelgarn
2017-04-18 3:23 ` Btrfs/SSD Duncan
2017-04-18 4:58 ` Btrfs/SSD Roman Mamedov
2017-04-17 18:34 ` Btrfs/SSD Chris Murphy
2017-04-17 19:26 ` Btrfs/SSD Austin S. Hemmelgarn
2017-04-17 19:39 ` Btrfs/SSD Chris Murphy
2017-04-18 11:31 ` Btrfs/SSD Austin S. Hemmelgarn
2017-04-18 12:20 ` Btrfs/SSD Hugo Mills
2017-04-18 13:02 ` Btrfs/SSD Imran Geriskovan
2017-04-18 13:39 ` Btrfs/SSD Austin S. Hemmelgarn
2017-05-12 18:27 ` Btrfs/SSD Kai Krakow
2017-05-12 20:31 ` Btrfs/SSD Imran Geriskovan
2017-05-13 9:39 ` Btrfs/SSD Duncan
2017-05-13 11:15 ` Btrfs/SSD Janos Toth F.
2017-05-13 11:34 ` [OT] SSD performance patterns (was: Btrfs/SSD) Kai Krakow
2017-05-14 16:21 ` Btrfs/SSD Chris Murphy
2017-05-14 18:01 ` Btrfs/SSD Tomasz Kusmierz
2017-05-14 20:47 ` Btrfs/SSD (my -o ssd "summary") Hans van Kranenburg
2017-05-14 23:01 ` Btrfs/SSD Imran Geriskovan
2017-05-15 0:23 ` Btrfs/SSD Tomasz Kusmierz
2017-05-15 0:24 ` Btrfs/SSD Tomasz Kusmierz
2017-05-15 11:25 ` Btrfs/SSD Imran Geriskovan
2017-05-15 11:46 ` Btrfs/SSD Austin S. Hemmelgarn
2017-05-15 19:22 ` Btrfs/SSD Kai Krakow
2017-05-12 4:51 ` Btrfs/SSD Duncan
2017-05-12 13:02 ` Btrfs/SSD Imran Geriskovan
2017-05-12 18:36 ` Btrfs/SSD Kai Krakow
2017-05-13 9:52 ` Btrfs/SSD Roman Mamedov
2017-05-13 10:47 ` Btrfs/SSD Kai Krakow
2017-05-15 12:03 ` Btrfs/SSD Austin S. Hemmelgarn
2017-05-15 13:09 ` Btrfs/SSD Tomasz Kusmierz
2017-05-15 19:12 ` Btrfs/SSD Kai Krakow
2017-05-16 4:48 ` Duncan [this message]
2017-05-15 19:49 ` Btrfs/SSD Kai Krakow
2017-05-15 20:05 ` Btrfs/SSD Tomasz Torcz
2017-05-16 1:58 ` Btrfs/SSD Kai Krakow
2017-05-16 12:21 ` Btrfs/SSD Tomasz Torcz
2017-05-16 12:35 ` Btrfs/SSD Austin S. Hemmelgarn
2017-05-16 17:08 ` Btrfs/SSD Kai Krakow
2017-05-16 11:43 ` Btrfs/SSD Austin S. Hemmelgarn
2017-05-14 8:46 ` Btrfs/SSD Duncan
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