VirtualBox

Changes between Version 7 and Version 8 of Ticket #16677


Ignore:
Timestamp:
Apr 21, 2017 8:06:59 AM (7 years ago)
Author:
Frank Mehnert
Comment:

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  • Ticket #16677 – Description

    v7 v8  
    99hdparm -a0 /dev/sda
    1010}}}
    11  seems to do the same as
     11seems to do the same as
    1212{{{
    1313# echo 0 > /sys/class/block/sda/queue/read_ahead_kb
    … …  
    1818 1. get archlinux-2017.03.01-dual.iso  (or any current/latest iso, BUT then the dd repro will most likely not work at the same 'skip'!)
    1919
    20 However according to this comment from frank https://www.virtualbox.org/ticket/15281#comment:8 , I shouldn't be posting any such links here, but then reproducing this(with accuracy) is going to be really hard without them, so I'm going to be obscuring them with base64, hopefully that's a good compromise between not posting them and posting them...
    21 
    22 Pick a download location(476.0 MB):
    23 
    24 
    25 archlinux webpage with torrent/magnet links, located here:
    26 
     20 However according to this comment from frank https://www.virtualbox.org/ticket/15281#comment:8 , I shouldn't be posting any such links here, but then reproducing this(with accuracy) is going to be really hard without them, so I'm going to be obscuring them with base64, hopefully that's a good compromise between not posting them and posting them...
     21
     22 Pick a download location(476.0 MB):
     23
     24
     25 archlinux webpage with torrent/magnet links, located here:
    2726{{{
    2827aHR0cHM6Ly93d3cuYXJjaGxpbnV4Lm9yZy9yZWxlbmcvcmVsZWFzZXMvMjAxNy4wMy4wMS8=
    2928}}}
    3029
    31 (my)google drive, directory with the iso file:
    32 
     30 (my)google drive, directory with the iso file:
    3331{{{
    3432aHR0cHM6Ly9kcml2ZS5nb29nbGUuY29tL29wZW4/aWQ9MEI2UC05VXlKRmp6S1ZsWkhUa1E0YUZWbGRUUQ==
    3533}}}
    3634
    37 sha1sum for that iso is:
    38 
     35 sha1sum for that iso is:
    3936{{{
    4037f426866ca632a35a3eeae8e4080cff25ec8da614  archlinux-2017.03.01-dual.iso
    … …  
    4239
    4340 2. get my VM
    44 the reproduction steps only work with my VM with that specific vdi file; if that vdi gets cloned(even if to same format: vdi) it will not reproduce anymore! The IDE CD repro. steps will still work and make it hang reliably though (see 'next section')
    45 
    46 Pick one download location(1.9G):
    47 
    48 
    49 dropbox:
    50 
     41 the reproduction steps only work with my VM with that specific vdi file; if that vdi gets cloned(even if to same format: vdi) it will not reproduce anymore! The IDE CD repro. steps will still work and make it hang reliably though (see 'next section')
     42
     43 Pick one download location(1.9G):
     44
     45 dropbox:
    5146{{{
    5247aHR0cHM6Ly93d3cuZHJvcGJveC5jb20vc2gvaHFiMGIwNDB4aTYyMDN2L0FBRE50RVF5Z0tGU1duNnpRaDNZS1VVcmE/ZGw9MA==
    5348}}}
    5449
    55 (my)google drive:
    56 
     50 (my)google drive:
    5751{{{
    5852aHR0cHM6Ly9kcml2ZS5nb29nbGUuY29tL2RyaXZlL2ZvbGRlcnMvMEI2UC05VXlKRmp6S1Rrc3lZM0pZWlhSbU1Xcz91c3A9c2hhcmluZw==
    5953}}}
    6054
    61 download these 3 files:
    62 ''arch3.vbox
    63 arch3.vdi
    64 checksums''
    65 
    66 md5,sha1,sha256 and sha512 for those two are:
    67 
     55 download these 3 files: ''arch3.vbox, arch3.vdi, checksums''
     56
     57 md5,sha1,sha256 and sha512 for those two are:
    6858{{{
    69591aa8124771fd7c8761435ff26ee2d55b  ./arch3.vbox
    … …  
    8070 3. TODO: "import" the .vbox somehow in the VirtualBox UI! (export/import wouldn't have worked because it clones my vdi; and imports it as vmdk)
    8171 4. ensure 'Controller: IDE' has 'Use Host I/O Cache' enabled (it does by default when creating new VM)
    82 ^ this means CD access won't hang
     72 ^ this means CD access won't hang
    8373 5. ensure 'Controller: SATA' has 'Use Host I/O Cache' disabled (it's disabled by default when creating new VM)
    84 ^ this means HDD access will hang, below.
     74 ^ this means HDD access will hang, below.
    8575 6. start, Boot from CD/iso, you see grub "Boot Arch Linux (x86_64)", press Enter to boot from the iso
    86 (do not boot HDD's OS, it will hang during boot sequence)
     76 (do not boot HDD's OS, it will hang during boot sequence)
    8777 7. you get to the root prompt, auto logged in.
    8878
    89 info:
    90 
    91 
    92 This is the default, 256KiB of readahead:
    93 
    94 
     79 info:
     80
     81 This is the default, 256KiB of readahead:
    9582{{{
    9683# hdparm -a /dev/sda
    … …  
    156143
    157144
    158 No hang when the following: ----
    159 
    160 
    161 
    162 boot session 1:
     145 No hang when the following: ----
     146
     147
     148 boot session 1:
    163149
    164150{{{
    … …  
    166152}}}
    167153
    168 boot session 2:
    169 
     154 boot session 2:
    170155{{{
    171156dd if=/dev/sda of=/dev/null bs=512 skip=42216 count=2
    172157}}}
    173158
    174 boot session 3:
    175 
     159 boot session 3:
    176160{{{
    177161dd if=/dev/sda of=/dev/null bs=512 skip=42215 count=1
    … …  
    180164
    181165
    182 Hang when the following: ----
    183 
    184 
    185 
    186 boot session 1:
    187 
     166 Hang when the following: ----
     167
     168
     169 boot session 1:
    188170{{{
    189171dd if=/dev/sda of=/dev/null bs=512 skip=42208 count=9
    190172}}}
    191173
    192 boot session 2:
    193 
     174 boot session 2:
    194175{{{
    195176dd if=/dev/sda of=/dev/null bs=512 skip=42215 count=2
    196177}}}
    197178
    198 boot session 3:
    199 
     179 boot session 3:
    200180{{{
    201181dd if=/dev/sda of=/dev/null bs=512 skip=42215 count=2

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