Troca de hd externo

86mello
(usa Outra)

Enviado em 13/08/2014 - 10:03h

Bom dia pessoal.
Seguinte, criei uma rotina de backup para dois HD externos,
cada semana um fica conectado na máquina, só que quando estou trocando os hds, ele ta trocando também o sdb passando para sdc.
Como faço para manter sempre o mesmo?
Ubuntu 14.04 lts.

danniel-lara
(usa Fedora)

Enviado em 13/08/2014 - 10:16h

tu podes ajustar o script para ver qual /dev/sdX esta conectado o case usb e montar e efetuar o backup

uma sugestão

renato_pacheco
(usa Debian)

Enviado em 13/08/2014 - 10:34h

O mais fácil e definitivo: registrar o UUID dos seus HDs no fstab e ser feliz. Primeiro, descubra o UUID do seu HD:

blkid /dev/sdb1 <= exemplo, apenas!
 

Depois, registre-o dentro d /etc/fstab. Usando o exemplo acima:

UUID="8b3738ee-cc44-4825-8fd7-f73f213b1890" /media/HD-1 ntfs-3g noauto,rw,user 0 0
 

Considerando q o sistema d arquivos seja NTFS e o ponto d montagem seja /media/HD-1.

86mello
(usa Outra)

Enviado em 13/08/2014 - 10:45h

ali diz "noauto".
se deixar auto, ele vai montar automaticamente?

renato_pacheco
(usa Debian)

Enviado em 13/08/2014 - 11:08h

Sim.

86mello
(usa Outra)

Enviado em 13/08/2014 - 11:47h

Certo...mas exemplo.
HD1 pega o sdb1
HD2 pega o sdc1

Os dois nunca ficam ao mesmo tempo no servidor.
Como fazer para eles sempre pegar o sdb1?

renato_pacheco
(usa Debian)

Enviado em 13/08/2014 - 16:11h

Cara, o método q t passei é bem mais fácil, MAS... se vc quer por dificuldade na sua vida, vc pode fixar os /dev através do udev. Vc executa o comando abaixo quando vc plugar o seu HD (supondo q ele pegou sdb1):

udevadm info --query all --path /sys/block/sdb/sdb1 --attribute-walk
 

A saída vai sair bem parecida com essa (os próximos comandos vão se basear no exemplo abaixo):

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/block/sdb/sdb1':
    KERNEL=="sdb1"
    SUBSYSTEM=="block"
    DRIVER==""
    ATTR{partition}=="1"
    ATTR{start}=="2048"
    ATTR{size}=="1250260992"
    ATTR{alignment_offset}=="0"
    ATTR{stat}=="      73       30      818      380        1        0        8        0        0      376      380"
    ATTR{inflight}=="       0        0"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0/host6/target6:0:0/6:0:0:0/block/sdb':
    KERNELS=="sdb"
    SUBSYSTEMS=="block"
    DRIVERS==""
    ATTRS{range}=="16"
    ATTRS{ext_range}=="256"
    ATTRS{removable}=="0"
    ATTRS{ro}=="0"
    ATTRS{size}=="1250263728"
    ATTRS{alignment_offset}=="0"
    ATTRS{capability}=="52"
    ATTRS{stat}=="     100       33     1058      756        1        0        8        0        0      752      756"
    ATTRS{inflight}=="       0        0"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0/host6/target6:0:0/6:0:0:0':
    KERNELS=="6:0:0:0"
    SUBSYSTEMS=="scsi"
    DRIVERS=="sd"
    ATTRS{device_blocked}=="0"
    ATTRS{type}=="0"
    ATTRS{scsi_level}=="3"
    ATTRS{vendor}=="SAMSUNG "
    ATTRS{model}=="HM641JI         "
    ATTRS{rev}=="    "
    ATTRS{state}=="running"
    ATTRS{timeout}=="30"
    ATTRS{iocounterbits}=="32"
    ATTRS{iorequest_cnt}=="0x76"
    ATTRS{iodone_cnt}=="0x76"
    ATTRS{ioerr_cnt}=="0x0"
    ATTRS{modalias}=="scsi:t-0x00"
    ATTRS{evt_media_change}=="0"
    ATTRS{queue_depth}=="1"
    ATTRS{queue_type}=="none"
    ATTRS{max_sectors}=="240"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0/host6/target6:0:0':
    KERNELS=="target6:0:0"
    SUBSYSTEMS=="scsi"
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0/host6':
    KERNELS=="host6"
    SUBSYSTEMS=="scsi"
    DRIVERS==""

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0':
    KERNELS=="1-5:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb-storage"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bNumEndpoints}=="02"
    ATTRS{bInterfaceClass}=="08"
    ATTRS{bInterfaceSubClass}=="06"
    ATTRS{bInterfaceProtocol}=="50"
    ATTRS{modalias}=="usb:v152Dp2329d0100dc00dsc00dp00ic08isc06ip50"
    ATTRS{supports_autosuspend}=="0"
    ATTRS{interface}=="MSC Bulk-Only Transfer"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1/1-5':
    KERNELS=="1-5"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}=="USB Mass Storage"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bMaxPower}=="  2mA"
    ATTRS{urbnum}=="374"
    ATTRS{idVendor}=="152d"
    ATTRS{idProduct}=="2329"
    ATTRS{bcdDevice}=="0100"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="480"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="4"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="JMicron"
    ATTRS{product}=="USB to ATA/ATAPI Bridge"
    ATTRS{serial}=="2390A02056FF"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{urbnum}=="49"
    ATTRS{idVendor}=="1d6b"
    ATTRS{idProduct}=="0002"
    ATTRS{bcdDevice}=="0206"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="480"
    ATTRS{busnum}=="1"
    ATTRS{devnum}=="1"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="6"
    ATTRS{quirks}=="0x0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="Linux 2.6.32-5-686 ehci_hcd"
    ATTRS{product}=="EHCI Host Controller"
    ATTRS{serial}=="0000:00:1a.7"
    ATTRS{authorized_default}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:1a.7':
    KERNELS=="0000:00:1a.7"
    SUBSYSTEMS=="pci"
    DRIVERS=="ehci_hcd"
    ATTRS{vendor}=="0x8086"
    ATTRS{device}=="0x3b3c"
    ATTRS{subsystem_vendor}=="0x1458"
    ATTRS{subsystem_device}=="0x5006"
    ATTRS{class}=="0x0c0320"
    ATTRS{irq}=="18"
    ATTRS{local_cpus}=="ffffffff"
    ATTRS{local_cpulist}=="0-31"
    ATTRS{modalias}=="pci:v00008086d00003B3Csv00001458sd00005006bc0Csc03i20"
    ATTRS{enable}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{msi_bus}==""
    ATTRS{companion}==""

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""
 

Ae vc cria um arquivo novo neste caminho /etc/udev/rules.d/90-backup.rules e insere os dados lá assim:

ATTRS{vendor}=="SAMSUNG ", ATTRS{model}=="HM641JI         ", SYMLINK+="sdb1"
 

Ae, basta reiniciar o udev (se for Debian ou Debian-like):

invoke-rc.d udev restart
 

Ae vc desplugue e plugue novamente e veja se o seu HD foi listado como /dev/sdb1, com o comando fdisk -l.

Fonte: http://www.zeitoun.net/articles/udev-rules-presistent-external-disk/start