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Old 12-14-2013, 06:03 AM   #1
salmanucit
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Maximum physical disks on Linux 6


Hi,
Can any one explain how many physical disks can be attached with a server running Linux?
Actually I have a virtual machine which is running Oracle/Redhat Linux 6 (64 bit). For some reasons, we are planning to attach 32 GB virtual disks. Any time we need space, we would add another 32G physical disk. My question is, is there any limit on physical disks/volumes which can attach and create partitions using Linux 6. It would probably look as follows
/dev/sdc
/dev/sdd
/dev/sde
/dev/sdf
/dev/sdg
...
...
...



Thanks

Salman

Last edited by salmanucit; 12-14-2013 at 06:09 AM.
 
Old 12-14-2013, 06:32 AM   #2
druuna
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Too my knowledge Linux doesn't put a hard limit on the amount of disks that can be attached. It depends on controllers, IDE vs SCSI, amount of major/minor device numbers etc.

Maybe these links shed some light on this topic:
- SCSI disk limitations: Defining the number of disk devices on Linux
- What is the max number of devices (disks) that can be mounted?
 
Old 12-14-2013, 04:08 PM   #3
jefro
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At various times and for various reasons there were limits.

http://superuser.com/questions/40627...n-64-bit-linux
 
Old 12-14-2013, 10:22 PM   #4
John VV
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32 gig is tiny
my 12 year old computer that came with xp ( no service pack) in 2001 came with a 80 gig drive

for a 32 gig drive , was this a win98 or 95 computer at one time


or is this a 32 gig flash usb thumb drive

rhel 6 will auto mount a new drive ( udev) to /media/"name of the drive or by uuid "
 
Old 12-15-2013, 11:46 AM   #5
DavidMcCann
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According to Red Hat, there is a limit for the filing system: currently 100TB if you use XFS or 16TB with ext4, increasing in RH 7 to 500 and 50: that's a lot of disks.

https://access.redhat.com/site/docum...nd_limits.html
 
Old 12-15-2013, 10:13 PM   #6
rknichols
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Quote:
Originally Posted by DavidMcCann View Post
According to Red Hat, there is a limit for the filing system: currently 100TB if you use XFS or 16TB with ext4, increasing in RH 7 to 500 and 50: that's a lot of disks.
And, that limit would only be relevant if you wanted a single filesystem that spanned all your disks. I don't know of any hard limit to the number of mounted filesystems.
 
  


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