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charetjc
n00b
Joined: 21 Jul 2006
Posts: 19
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 Posted: Mon Jul 09, 2012 1:54 am Post subject: e2fsprogs mkfs corrupts main gpt header on usb stick |
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I'm trying to create an ext2 filesystem on a usbstick with one guid partition table. After formatting the first partition, gdisk reports that the main header has a bad CRC.
Software:
sys-apps/gptfdisk 0.8.4 or 0.8.5
sys-apps/util-linux 2.20.1-r1
sys-fs/e2fsprogs 1.42
sys-fs/e2fsprogs-libs 1.42
sys-kernel/gentoo-sources 3.2.12 (self compiled kernel with EFI GUID Partition config)
Steps to reproduce:
My usb stick is /dev/sdc.
| Code: | # gdisk /dev/sdc
Command (? for help): n (accept defaults for other questions)
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sdc.
The operation has completed successfully.
# gdisk -l /dev/sdc
GPT fdisk (gdisk) version 0.8.5
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sdc: 246272 sectors, 120.2 MiB
Logical sector size: 512 bytes
Disk identifier (GUID): BE3F7105-0FED-4736-9502-276A540B3F0D
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 246238
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 246238 119.2 MiB 8300 Linux filesystem
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At this point I can remove and insert the usb stick and the reports no errors.
| Code: | # mkfs.ext2 /dev/sdc1
mke2fs 1.42 (29-Nov-2011)
warning: 251 blocks unused.
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
30840 inodes, 122881 blocks
6156 blocks (5.01%) reserved for the super user
First data block=1
Maximum filesystem blocks=67371008
15 block groups
8192 blocks per group, 8192 fragments per group
2056 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729
Allocating group tables: done
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
# gdisk -l /dev/sdc
GPT fdisk (gdisk) version 0.8.5
Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!
Caution! After loading partitions, the CRC doesn't check out!
Warning! Main partition table CRC mismatch! Loaded backup partition table
instead of main partition table!
Warning! One or more CRCs don't match. You should repair the disk!
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged
****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Disk /dev/sdc: 246272 sectors, 120.2 MiB
Logical sector size: 512 bytes
Disk identifier (GUID): BE3F7105-0FED-4736-9502-276A540B3F0D
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 246238
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 246238 119.2 MiB 8300 Linux filesystem
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And now the main GPT header is corrupted. This bug/feature/"f*&! up on my part" is 100% reproducible on my gentoo box.
I can easily restore the main GPT header with gdisk, but this problem shouldn't be occurring in the first place. On top of that, the data I save on this usb stick disappears when I try to mount it on my other linux box (arch linux). I'm not sure if this data loss is related, but trying to solve one problem at a time.
Anyone know why this "just doesn't work"?
Thanks |
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nlsa8z6zoz7lyih3ap
Guru
Joined: 25 Sep 2007
Posts: 388
Location: Canada
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| Posted: Sun Jul 15, 2012 2:22 pm Post subject: |
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I am unable to replicate your problem. Perhaps the problem is with that particular USB stick.
Have your tried this with another one or even a different brand?
After making the ext2 file system I get
| Quote: | gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.4
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sdb: 31326208 sectors, 14.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 157C2DE5-3C81-4663-A4BB-CE8EFD6E2358
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 31326174
Partitions will be aligned on 64-sector boundaries
Total free space is 30 sectors (15.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 64 31326174 14.9 GiB 8300 Linux filesystem
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piedar
Tux's lil' helper
Joined: 09 Aug 2010
Posts: 82
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| Posted: Fri Jul 27, 2012 11:26 pm Post subject: |
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I just ran into this on a new SSD that I'm preparing with an external eSATA connector.
| Code: | system76-pc ~ # gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.4
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Disk /dev/sdb: 241612976 sectors, 115.2 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 3B2B8F2A-E6AF-4608-B0C7-432F1E294C2E
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 241612942
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 52430847 25.0 GiB 8300 Linux filesystem
2 52430848 241612942 90.2 GiB 8300 Linux filesystem
system76-pc ~ # mkfs.ext4 /dev/sdb1
mke2fs 1.42 (29-Nov-2011)
Discarding device blocks: done
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
7553024 inodes, 30201621 blocks
1510081 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
922 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
system76-pc ~ # gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.4
Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!
Caution! After loading partitions, the CRC doesn't check out!
Warning! Main and backup partition tables differ! Use the 'c' and 'e' options
on the recovery & transformation menu to examine the two tables.
Warning! One or more CRCs don't match. You should repair the disk!
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged
****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Warning! Secondary partition table overlaps the last partition by
2305983746473025938 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdb: 241612976 sectors, 115.2 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 3B2B8F2A-E6AF-4608-B0C7-432F1E294C2E
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 241612942
Partitions will be aligned on 1-sector boundaries
Total free space is 241612909 sectors (115.2 GiB)
Number Start (sector) End (sector) Size Code Name
5 140737488388096 8192 8.0 ZiB FFFF
7 140733208100864 63331865464930305 28.1 EiB FFFF
29 4475355923458 2305979344360572449 1.0 ZiB FFFF
30 4492535792646 2305979344360574497 1.0 ZiB FFFF
31 4509715661834 2305979344360576545 1.0 ZiB FFFF
32 4526895531022 2305983746702056993 1.0 ZiB FFFF
33 2251872828653569 2305983746702574112 1023.1 EiB FFFF
34 2251890008522757 2305983746702576160 1023.1 EiB FFFF
35 2251907188391945 2305979344361099808 1023.1 EiB FFFF
36 2251924368261133 2305983746702580256 1023.1 EiB FFFF
37 4503672642863105 2305983746703098400 1022.1 EiB FFFF
38 4503689822732293 2305983746703100448 1022.1 EiB FFFF
39 4503707002601481 2305983746703102496 1022.1 EiB FFFF
40 4503724182470669 2305983746703104544 1022.1 EiB FFFF
41 6755472457072641 2305979344362144288 1021.1 EiB FFFF
42 6755489636941829 2305983746703624736 1021.1 EiB FFFF
43 6755506816811017 2305983746703626784 1021.1 EiB FFFF
44 6755523996680205 2305983746703628832 1021.1 EiB FFFF
45 9007272271282177 2305983746704146976 1020.1 EiB FFFF
46 9007289451151365 2305983746704149024 1020.1 EiB FFFF
47 9007306631020553 2305983746704151072 1020.1 EiB FFFF
48 9007323810889741 2305983746704153120 1020.1 EiB FFFF
49 11259072085491713 2305979344363192864 1019.1 EiB FFFF
50 11259089265360901 2305983746704673312 1019.1 EiB FFFF
51 11259106445230089 2305983746704675360 1019.1 EiB FFFF
52 11259123625099277 2305983746704677408 1019.1 EiB FFFF
53 13510871899701249 2305983746705195552 1018.1 EiB FFFF
54 13510889079570437 2305983746705197600 1018.1 EiB FFFF
55 13510906259439625 2305983746705199648 1018.1 EiB FFFF
56 13510923439308813 2305983746705201696 1018.1 EiB FFFF
57 15762671713910785 2305983746705719840 1017.1 EiB FFFF
58 15762688893779973 2305983746705721888 1017.1 EiB FFFF
59 15762706073649161 2305983746705723936 1017.1 EiB FFFF
60 15762723253518349 2305979344364247584 1017.1 EiB FFFF
61 18014471528120321 2305983746706244128 1016.1 EiB FFFF
62 18014488707989509 2305983746706246176 1016.1 EiB FFFF
63 18014505887858697 2305983746706248224 1016.1 EiB FFFF
64 18014523067727885 2305983746706250272 1016.1 EiB FFFF
65 20266271342329857 2305983746706768416 1015.1 EiB FFFF
66 20266288522199045 2305983746706770464 1015.1 EiB FFFF
67 20266305702068233 2305983746706772512 1015.1 EiB FFFF
68 20266322881937421 2305983746706774560 1015.1 EiB FFFF
69 22518071156539393 2305983746707292704 1014.1 EiB FFFF
70 22518088336408581 2305983746707294752 1014.1 EiB FFFF
71 22518105516277769 2305983746707296800 1014.1 EiB FFFF
72 22518122696146957 2305983746707298848 1014.1 EiB FFFF
73 24769870970748929 2305983746707816992 1013.1 EiB FFFF
74 24769888150618117 2305983746707819040 1013.1 EiB FFFF
75 24769905330487305 2305983746707821088 1013.1 EiB FFFF
76 24769922510356493 2305983746707823136 1013.1 EiB FFFF
77 27021670784958465 2305983746708341280 1012.1 EiB FFFF
78 27021687964827653 2305983746708343328 1012.1 EiB FFFF
79 27021705144696841 2305983746708345376 1012.1 EiB FFFF
80 27021722324566029 2305983746708347424 1012.1 EiB FFFF
81 29273470599168001 2305983746708865568 1011.1 EiB FFFF
82 29273487779037189 2305983746708867616 1011.1 EiB FFFF
83 29273504958906377 2305983746708869664 1011.1 EiB FFFF
84 29273522138775565 2305983746708871712 1011.1 EiB FFFF
85 31525270413377537 2305983746709389856 1010.1 EiB FFFF
86 31525287593246725 2305983746709391904 1010.1 EiB FFFF
87 31525304773115913 2305983746709393952 1010.1 EiB FFFF
88 31525321952985101 2305983746709396000 1010.1 EiB FFFF
89 33777070227587073 2305983746709914144 1009.1 EiB FFFF
90 33777087407456261 2305983746709916192 1009.1 EiB FFFF
91 33777104587325449 2305983746709918240 1009.1 EiB FFFF
92 33777121767194637 2305983746709920288 1009.1 EiB FFFF
93 36028870041796609 2305983746710438432 1008.1 EiB FFFF
94 36028887221665797 2305983746710440480 1008.1 EiB FFFF
95 36028904401534985 2305983746710442528 1008.1 EiB FFFF
96 36028921581404173 2305983746710444576 1008.1 EiB FFFF
97 38280669856006145 2305983746710962720 1007.1 EiB FFFF
98 38280687035875333 2305983746710964768 1007.1 EiB FFFF
99 38280704215744521 2305983746710966816 1007.1 EiB FFFF
100 38280721395613709 2305983746710968864 1007.1 EiB FFFF
101 40532469670215681 2305983746711487008 1006.1 EiB FFFF
102 40532486850084869 2305983746711489056 1006.1 EiB FFFF
103 40532504029954057 2305983746711491104 1006.1 EiB FFFF
104 40532521209823245 2305983746711493152 1006.1 EiB FFFF
105 42784269484425217 2305983746712011296 1005.1 EiB FFFF
106 42784286664294405 2305983746712013344 1005.1 EiB FFFF
107 42784303844163593 2305983746712015392 1005.1 EiB FFFF
108 42784321024032781 2305983746712017440 1005.1 EiB FFFF
109 45036069298634753 2305983746712535584 1004.1 EiB FFFF
110 45036086478503941 2305983746712537632 1004.1 EiB FFFF
111 45036103658373129 2305983746712539680 1004.1 EiB FFFF
112 45036120838242317 2305983746712541728 1004.1 EiB FFFF
113 47287869112844289 2305983746713059872 1003.1 EiB FFFF
114 47287886292713477 2305983746713061920 1003.1 EiB FFFF
115 47287903472582665 2305983746713063968 1003.1 EiB FFFF
116 47287920652451853 2305983746713066016 1003.1 EiB FFFF
117 49539668927053825 2305983746713584160 1002.1 EiB FFFF
118 49539686106923013 2305983746713586208 1002.1 EiB FFFF
119 49539703286792201 2305983746713588256 1002.1 EiB FFFF
120 49539720466661389 2305983746713590304 1002.1 EiB FFFF
121 51791468741263361 2305983746714108448 1001.1 EiB FFFF
122 51791485921132549 2305983746714110496 1001.1 EiB FFFF
123 51791503101001737 2305983746714112544 1001.1 EiB FFFF
124 51791520280870925 2305983746714114592 1001.1 EiB FFFF
125 54043268555472897 2305983746714632736 1000.1 EiB FFFF
126 54043285735342085 2305983746714634784 1000.1 EiB FFFF
127 54043302915211273 2305983746714636832 1000.1 EiB FFFF
128 54043320095080461 2305983746714638880 1000.1 EiB FFFF |
I'm not really interested enough in GPT to futz with it, so I've just used MBR and fdisk instead. |
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okel
n00b
Joined: 04 Nov 2004
Posts: 38
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| Posted: Thu Sep 05, 2013 11:13 am Post subject: |
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I have this problem on my machine. The drive is a 3 TB external hard disk, connected with eSATA II.
After having created a single partition with default values using gdisk /dev/sda, I create the file system:
| Quote: | borg ~ # mkfs.ext4 -m 0 /dev/sda1
mke2fs 1.42.7 (21-Jan-2013)
Die Ausrichtung von /dev/sda1 ist um 3584 Bytes verschoben.
Das könnte zu sehr schlechter Leistung führen. Eine (Neu-)Partionierung
wird empfohlen.
Dateisystem-Label=
OS-Typ: Linux
Blockgröße=4096 (log=2)
Fragmentgröße=4096 (log=2)
Stride=0 Blöcke, Stripebreite=0 Blöcke
134217728 Inodes, 536870911 Blöcke
0 Blöcke (0.00%) reserviert für den Superuser
Erster Datenblock=0
Maximale Dateisystem-Blöcke=0
16384 Blockgruppen
32768 Blöcke pro Gruppe, 32768 Fragmente pro Gruppe
8192 Inodes pro Gruppe
Superblock-Sicherungskopien gespeichert in den Blöcken:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848, 512000000
Platz für Gruppentabellen wird angefordert: erledigt
Inode-Tabellen werden geschrieben: erledigt
Erstelle Journal (32768 Blöcke): erledigt
Schreibe Superblöcke und Dateisystem-Accountinginformationen: erledigt
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Seems fine except for the bad alignment.
Then the gpt is damaged:
| Quote: | borg ~ # gdisk /dev/sda
GPT fdisk (gdisk) version 0.8.6
Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!
Caution! After loading partitions, the CRC doesn't check out!
Warning! Main partition table CRC mismatch! Loaded backup partition table
instead of main partition table!
Warning! One or more CRCs don't match. You should repair the disk!
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged
****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Command (? for help):
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I appreciate any ideas.
Stefan |
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dE_logics
Advocate
Joined: 02 Jan 2009
Posts: 2253
Location: $TERM
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| Posted: Tue Nov 04, 2014 5:00 am Post subject: |
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Same here while using both parted and fdisk (new one which support GPT).
Honestly this looks like a kernel bug.
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Jaglover
Watchman
Joined: 29 May 2005
Posts: 8291
Location: Saint Amant, Acadiana
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dE_logics
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Joined: 02 Jan 2009
Posts: 2253
Location: $TERM
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| Posted: Tue Nov 04, 2014 5:25 am Post subject: |
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| Jaglover wrote: | | And why exactly are you creating a partition when you do not need it? The idea of partitioning is to have more than one filesystem in one device. |
It inter-operates better with the desktop.
It's made clear that the device holds some data, and it gives hints about the FS which's held in it.
The same reason why LVM is made on top of GPT/MBR.
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dE_logics
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Joined: 02 Jan 2009
Posts: 2253
Location: $TERM
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| Posted: Tue Nov 04, 2014 5:26 am Post subject: |
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It appears we guys dont have GPT support built into the kernel.
So yes -- it was a kernel problem.
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Jaglover
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Joined: 29 May 2005
Posts: 8291
Location: Saint Amant, Acadiana
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| Posted: Tue Nov 04, 2014 6:08 am Post subject: |
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| dE_logics wrote: | | Jaglover wrote: | | And why exactly are you creating a partition when you do not need it? The idea of partitioning is to have more than one filesystem in one device. |
It inter-operates better with the desktop.
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No it does not.
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Please learn how to denote units correctly! |
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dE_logics
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Joined: 02 Jan 2009
Posts: 2253
Location: $TERM
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| Posted: Tue Nov 04, 2014 9:24 am Post subject: |
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| Jaglover wrote: | | dE_logics wrote: | | Jaglover wrote: | | And why exactly are you creating a partition when you do not need it? The idea of partitioning is to have more than one filesystem in one device. |
It inter-operates better with the desktop.
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No it does not. |
Can you show me any e.gs where a device without a partition tables mounts automatically or shows up automatically on any of the available DEs?
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frostschutz
Advocate
Joined: 22 Feb 2005
Posts: 2977
Location: Germany
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| Posted: Tue Nov 04, 2014 2:13 pm Post subject: |
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| Jaglover wrote: | | The idea of partitioning is to have more than one filesystem in one device. |
The idea is also to declare what it's being used for.
Windows will leave a Linux partition alone. It won't do the same for a generic data partition, or an unpartitioned device, since it simply doesn't detect what it is.
The same goes for Linux programs such as installers. They're more likely to suggest using an unpartitioned device as install media than something else.
Last but not least, it's easy to create a partition table by accident (if you use any partitioner on the wrong device), corrupting your filesystem in the process (if the device was previously used unpartitioned).
Using a device without partition table is possible, but unusual and I'd not recommend it to anyone, even if you know what you're doing. |
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steveL
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Joined: 13 Sep 2006
Posts: 5153
Location: The Peanut Gallery
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| Posted: Thu Nov 06, 2014 4:41 am Post subject: |
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| dE_logics wrote: | It appears we guys dont have GPT support built into the kernel.
So yes -- it was a kernel problem. |
So was this the issue, and did you correct it?
(sorry but the nonsense questioning use-cases is just that: nonsense. And I'd like to see a [solved] on this.) |
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dE_logics
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Joined: 02 Jan 2009
Posts: 2253
Location: $TERM
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| Posted: Sat Nov 08, 2014 4:40 pm Post subject: |
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| steveL wrote: | | dE_logics wrote: | It appears we guys dont have GPT support built into the kernel.
So yes -- it was a kernel problem. |
So was this the issue, and did you correct it?
(sorry but the nonsense questioning use-cases is just that: nonsense. And I'd like to see a [solved] on this.) |
Yes.
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