{"id":163,"date":"2008-11-03T17:58:22","date_gmt":"2008-11-03T15:58:22","guid":{"rendered":"http:\/\/michauko.org\/blog\/?p=163"},"modified":"2009-10-08T15:15:02","modified_gmt":"2009-10-08T13:15:02","slug":"gros-disque-400-go-et-limitations","status":"publish","type":"post","link":"https:\/\/michauko.org\/blog\/gros-disque-400-go-et-limitations-163\/","title":{"rendered":"Gros disque (> 400 Go ?) et limitations"},"content":{"rendered":"

Moi qui croyait n’\u00eatre embett\u00e9 que sous Windows par ces histoires de limitations de taille de fichiers, de disques, de partitions etc, je viens de m’en prendre une en pleine t\u00eate : formatter une grappe RAID5 de 6*500 Go (SATA), volume utile 2.5 To.
\nJe n’avais pas trop fait attention \u00e0 l’installation de la Debian, mais j’ai loup\u00e9 une question cruciale par m\u00e9connaissance : le type de table de partition.<\/p>\n

Tout cela est expliqu\u00e9 et difficile \u00e0 suivre sur wikipedia<\/a>. Moi j’en retiendrai juste le r\u00e9sultat pratique.<\/p>\n

Eviter le probl\u00e8me \u00e0 l’installation…<\/h1>\n

Au tout premier acc\u00e8s au disque \u00ab\u00a0virtuel\u00a0\u00bb ainsi cr\u00e9\u00e9, je me souviens que le programme d’installation m’a demand\u00e9 \u00e7a :
\n\"Type<\/a>
\nCa n’arrive que sur des disques jamais initialis\u00e9s (comme des grappes RAID) ou des disques virtuels. Peut-\u00eatre aussi des disques sortis d’usine sans aucun pr\u00e9-traitement, je ne sais pas.
\nPar d\u00e9faut, c’\u00e9tait GPT. J’ai pas trop r\u00e9fl\u00e9chi, j’ai mis msdos car j’avais d\u00e9j\u00e0 eu ce cas (sur un disque virtuel de petite taille, type machine VirtualBox pour faire joujou). En fait, la proposition par d\u00e9faut doit \u00eatre la bonne. Car impossible de formatter au del\u00e0 de 300 Go ensuite (pourquoi 300 ?)
\nSi comme moi, vous avez r\u00e2t\u00e9 cette \u00e9tape, voici ci-dessous comment corriger.<\/p>\n

…ou le corriger apr\u00e8s coup<\/h1>\n

FDISK ne dit trop rien \u00e0 la cr\u00e9ation des partitions, masi il cr\u00e9e une partition de moindre taille.
\nCFDISK est \u00e0 peine plus bavard. En l’utilisant en console (et non pas \u00e0 distance), j’ai vu passer des messages d’erreur, notamment :<\/p>\n

Very big device. Trying to use READ CAPACITY(16)<\/pre>\n
De l\u00e0, Google m’a expliqu\u00e9 le probl\u00e8me et il a fallu le rectifier en changeant ce type de table de partitions. Vous pourrez alors adresser tout l’espace physique de votre disque et le formatter.<\/p>\n
Corrigez en utilisant l’outil PARTED :<\/p>\n
[root@toto: ~]$ parted \/dev\/sdb\r\nGNU Parted 1.7.1\r\nUsing \/dev\/sdb\r\nWelcome to GNU Parted! Type 'help' to view a list of commands.\r\n(parted) mklabel gpt\r\n(parted) mkpart\r\nPartition name?  []? MON_GROS_HD\r\nFile system type?  [ext2]? ext3\r\nStart? 0\r\nEnd? -1\r\n(parted) p\r\n\r\nDisk \/dev\/sdb: 2500GB\r\nSector size (logical\/physical): 512B\/512B\r\nPartition Table: gpt\r\n\r\nNumber  Start   End     Size    File system  Name    Flags\r\n 1      17.4kB  2500GB  2500GB               MON_GROS_HD\r\n\r\n(parted) quit\r\n[root@toto: ~]$ fdisk -l \/dev\/sdb\r\n\r\nDisk \/dev\/sdb: 2499.9 GB, 2499946741760 bytes\r\n255 heads, 63 sectors\/track, 303934 cylinders\r\nUnits = cylinders of 16065 * 512 = 8225280 bytes\r\n\r\n   Device Boot      Start         End      Blocks   Id  System\r\n\/dev\/sdb1               1      267350  2147483647+  ee  EFI GPT\r\n\r\n[root@toto: ~]$ mkfs.ext3 \/dev\/sdb1\r\nmke2fs 1.40-WIP (14-Nov-2006)\r\nFilesystem label=\r\nOS type: Linux\r\nBlock size=4096 (log=2)\r\nFragment size=4096 (log=2)\r\n305184768 inodes, 610338551 blocks\r\n30516927 blocks (5.00%) reserved for the super user\r\nFirst data block=0\r\nMaximum filesystem blocks=4294967296\r\n18627 block groups\r\n32768 blocks per group, 32768 fragments per group\r\n16384 inodes per group\r\nSuperblock backups stored on blocks:\r\n        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\r\n        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,\r\n        102400000, 214990848, 512000000, 550731776\r\n\r\nWriting inode tables: done\r\nCreating journal (32768 blocks): done\r\nWriting superblocks and filesystem accounting information: done\r\n\r\nThis filesystem will be automatically checked every 35 mounts or\r\n180 days, whichever comes first.  Use tune2fs -c or -i to override.\r\n\r\n<\/pre>\n
Et voil\u00e0 le travail.<\/p>\n
Au fait : ext3 semble \u00eatre limit\u00e9 \u00e0 8 To. S’il y a quelques ann\u00e9es 8 To paraissaient \u00eatre une limite lointaine, actuellement, c’est moins \u00e9vident. Il faudra alors passer en XFS ou ReiserFS (OK, j’\u00e9vite les blagues de mauvais go\u00fbt)<\/p>\n","protected":false},"excerpt":{"rendered":"
Moi qui croyait n’\u00eatre embett\u00e9 que sous Windows par ces histoires de limitations de taille de fichiers, de disques, de partitions etc, je viens de m’en prendre une en pleine t\u00eate : formatter une grappe …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2,387,82,83],"tags":[257,256,254,255],"class_list":["post-163","post","type-post","status-publish","format-standard","hentry","category-debian","category-ligne-de-commande","category-pl","category-ubuntu","tag-cfdisk","tag-fdisk","tag-gpt","tag-parted"],"yoast_head":"\nGros disque (> 400 Go ?) et limitations - Le blog de Michauko<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/michauko.org\/blog\/gros-disque-400-go-et-limitations-163\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gros disque (> 400 Go ?) et limitations - 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