以前経験したのに忘れてしまっていました．<\/p>\n\n\n\n
サーバーをSlackware ARM 15.0からRaspberry Pi OS 13.3に切り替え，古いサーバーのデータなどを整理していたら，総容量が200GB程度まで減りました．<\/p>\n\n\n\n
今まで1TBのSSDをつないでいましたが，半端な容量で使い道のない250GBのSSDがありこれに引っ越すことにしました．1TB SSDも空きます．<\/p>\n\n\n\n
作業はManjaro AMD64 (x86_64)で行います．fdiskでGPTのパーティションを切り，mkfsでブート用のvfatとルートのext4をフォーマットします．<\/p>\n\n\n\n
これが落とし穴で，Manjaroでフォーマットしたext4はSlackware 15.0では認識されないのです．<\/p>\n\n\n\n
2回，コピーしてブートしてくれないので，インターフェースが悪いのかSSD自体が悪いのかなど悩みましたが，ManjaroでフォーマットしたボリュームはSlackwareでは読めないことを思い出しました．<\/p>\n\n\n\n
このBLOGにもそれに関する記事があるはずですが今回見つけられませんでした😓<\/p>\n\n\n\n
Geminiに聞いてみたら，古いKernelでは最新のmkfs.ext4のデフォルトでフォーマットしたボリュームはtoo new<\/strong>でマウントできないんだそうです．<\/p>\n\n\n\n 回避策としては，<\/p>\n\n\n\n とします．あるいはSlackware上でフォーマットすればよいのです．<\/p>\n\n\n\n しかし，このような後方互換性のない新機能というのもちょっと困ったもんです．名前をext5にしてくれていればまだ分かりやすいものを．<\/p>\n","protected":false},"excerpt":{"rendered":" \u4ee5\u524d\u7d4c\u9a13\u3057\u305f\u306e\u306b\u5fd8\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3057\u305f\uff0e \u30b5\u30fc\u30d0\u30fc\u3092Slackware ARM 15.0\u304b\u3089Raspberry Pi OS 13.3\u306b\u5207\u308a\u66ff\u3048\uff0c\u53e4\u3044\u30b5\u30fc\u30d0\u30fc\u306e\u30c7\u30fc\u30bf\u306a\u3069\u3092\u6574\u7406\u3057\u3066\u3044\u305f\u3089\uff0c\u7dcf\u5bb9\u91cf\u304c200GB\u7a0b\u5ea6\u307e\u3067\u6e1b\u308a\u307e\u3057\u305f\uff0e 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