DiskWarriorはもうオワコンかもしれない

(2015-01-18追記:64ビット対応を果たしたDiskWarrior 5が出たので、再び神ツールの座に舞い戻ってきたかもしれない)

久々にTime Machineのsparsebundleが壊れた。

fsck_hfsで修復出来なかったのでDiskWarrior 4.4を引っ張り出してみるも「There is not enough memory. Restart from the disk warrior disc and try rebuilding again. If you report this error. Please mention the error code (2154)」と言われて修復不能。32GB積んでるマシンなので、実際メモリ不足って事はないと思うんだけどなぁ。

修復処理を始めてすぐにエラーを吐くので、恐らく修復対象ボリュームのファイル数から必要なメモリ数を見積もり、処理出来るか判断してるのだと思う。DWは32ビットアプリのようなので、使えるメモリの上限は4GB。この制限は仮想メモリを使っても突破出来ない(物理アドレス拡張を使えばこの限りではないが、DWが対応してるとも思えないし、そもそもOS XでPAEアプリを作れるかも不明)。要は、扱えるファイル数に上限があるって話ですな。Time Machineの性質上、バックアップ先のファイル数は大きくなりがちで、2154エラーで検索するとTime Machineの修復で発生している事例が多いのも頷ける。

では、DWが扱えるファイル数の上限はいくつだろうか?

DWのロジックが分からないので完全な推測になってしまうが、ファイルシステムの構造(B-Tree)を弄っているのは間違いないだろう。Technical Note TN1150: HFS Plus Volume Formatによると、1ノード(BTNodeDescriptor)≒1ファイルあたり14バイトとなっている。アライメントも考慮してキリよく16バイトとし、メモリ4GBフルに使ったとすると2.6億ファイルとなる。ちなみに、自分の手元のマシンは約52万ファイルを有しているので、500台分のファイルを扱える計算だ。

この数値だけなら十分大きいように見えるが、実際は4GBフルに使える訳じゃないし、1ファイルあたりの消費量ももっと大きいだろう。多めに見積もっても、せいぜい1億ファイルに届かない位なんじゃなかろうか。自分の感覚で言わせて貰うと、今の時代、少なくは無いが安心出来るほど多くもないって所かな。

まぁ、普通のボリュームに対してなら、まだまだ必要十分なスペックだろうけど。積極的にメンテされてる雰囲気がない点も気になるところ。

DiskWarriorとは全く関係ないが、sparsebundleの分割サイズ、もう少し大きくならんかねぇ。今どき8MBだと、分割数が数十万とかになっちゃって削除するのも一苦労なんだけど…。

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1 |
treyu
| 2025-10-07 10:55 | reply

Learn Who are the Jews?

https://www.youtube.com/shorts/SEB3w3A98rU


Don't hesitate to call it what it is

AIPAC ( https://www.youtube.com/watch?v=COx-t-Mk6UA ) and The Evangelical Church (America) are creating a GENOCIDE.

https://www.youtube.com/shorts/IrX9v6DKH1g

The most devastating genocide in the world is being carried out by the follwoing :

1- Benjamin Netanyahu and Donald Trump 2- The Evangelical Church in USA. 3- AIPAC, brows https://www.youtube.com/watch?v=COx-t-Mk6UA 4- Miriam Adelson brows https://www.youtube.com/watch?v=Nr0LkA7VW7Q 5- Elon Musk. 6- Timothy mellonand brows https://www.youtube.com/shorts/1XJ893-kAh0

Which kill innocent women and children in Gaza.

May the eyes of starving children haunt us all

https://www.jewishvoiceforlabour.org.uk/article/may-the-eyes-of-starving-children-haunt-us-all/

https://www.tiktok.com/@charitymealsuk/video/7534294624647580950?is_from_webapp=1&sender_device=pc&web_id=7537073515586897430

https://www.dci-palestine.org/starving_a_generation_report_indicts_israel_for_weaponizing_starvation_as_a_tool_of_genocide

https://www.tiktok.com/@1948nakba.p4/video/7536871676156398870?is_from_webapp=1&sender_device=pc&web_id=7537073515586897430

The Torah, which is part of the Bible, has commanded that the same be done to the Jews. The order of the Torah, which is part of the Bible, is to immediately kill any Jew you see on the street. Since the Jews in Gaza have also killed women and children, you should kill any Jews - men, women, and children - as soon as you see them, whether on the street or anywhere else. And because they have killed everyone in Gaza without mercy, you must do the same to them. If you carry out these actions, you will be following the order of the Torah, which is part of the Bible, and you will be rewarded by going to heaven.

2 |
Normandduasp
| 2026-03-17 10:32 | reply



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