Thank you for answer.   CENTOS 5.2 does not have "rawdevices" services and also NO "/etc/udev/permissions.d" file any more.

--- 08/7/17 (星期四)，Jeff <jlar310@gmail.com> 寫道：

寄件者: Jeff <jlar310@gmail.com>
主旨: Re: [CentOS] Raw device gone after reboot (Centos 5.2)!!!
收件者: "CentOS mailing list" <centos@centos.org>
日期: 2008 7 17 星期四 下午 5:45

2008/7/17 mcclnx mcc <mcclnx@yahoo.com.tw>:
> We are set up CENTOS 5.2 (X86) as our database server.  I created raw
> partitions and also put definition on /etc/sysconfig/rawdevices.
>
> I can use "raw -qa" see raw partitions.  The wield things is
after reboot
> /dev/raw is not exist any more.
>
>
>
> Does anyone know how to fix it?

Raw partitions are deprecated. I recall from prior posts that you are
using Informix, is that right? Recent versions of Informix implement
the O_DIRECT flag for disk I/O so raw devices are not needed

For our Informix installation, we point the server directly at the
/dev/sd* devices. The one trick is to create a file in
/etc/udev/permissions.d that sets the permissions for the disk devices
at boot.

# cat /etc/udev/permissions.d/40-informix.permissions
sdb5:informix:informix:0660
sdb6:informix:informix:0660
sdb7:informix:informix:0660
#

-- 
Jeff
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