Рамдиск был в канонических юниксах в разном виде еще задолго до ДОСа. Откуда, по-твоему, ДОС позаимствовал половину функционала?Цитирую:
root @ ktulhu / # man ramdiskadm
System Administration Commands ramdiskadm(1M)
NAME
ramdiskadm - administer ramdisk pseudo device
SYNOPSIS
/usr/sbin/ramdiskadm -a name size [g | m | k | b]
/usr/sbin/ramdiskadm -d name
/usr/sbin/ramdiskadm
DESCRIPTION
The ramdiskadm command administers ramdisk(7D), the ramdisk
driver. Use ramdiskadm to create a new named ramdisk device,
delete an existing named ramdisk, or list information about
existing ramdisks.
Ramdisks created using ramdiskadm are not persistent across
reboots.
[поскипано]
EXAMPLES
Example 1: Creating a 2MB Ramdisk Named mydisk
# ramdiskadm -a mydisk 2m
/dev/ramdisk/mydisk
Example 2: Listing All Ramdisks
# ramdiskadm
Block Device Size Removable
/dev/ramdisk/miniroot 134217728 No
/dev/ramdisk/certfs 1048576 No
/dev/ramdisk/mydisk 2097152 Yes
EXIT STATUS
ramdiskadm returns the following exit values:
0
Successful completion.
>0
An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsr |
|_____________________________|_____________________________|
| Interface Stability | Evolving |
|_____________________________|_____________________________|
SunOS 5.10 Last change: 25 Mar 2003 2
System Administration Commands ramdiskadm(1M)
SEE ALSO
attributes(5), ramdisk(7D)
NOTES
The abilities of ramdiskadm and the privilege level of the
person who uses the utility are controlled by the permis-
sions of /dev/ramdiskctl. Read access allows query opera-
tions, for example, listing device information. Write access
is required to do any state-changing operations, for exam-
ple, creating or deleting ramdisks.
As shipped, /dev/ramdiskctl is owned by root, in group sys,
and mode 0644, so all users can do query operations but only
root can perform state-changing operations. An administrator
can give write access to non-privileged users, allowing them
to add or delete ramdisks. However, granting such ability
entails considerable risk; such privileges should be given
only to a trusted group.
SunOS 5.10 Last change: 25 Mar 2003 3
А вообще этот функционал в Солярисе я помню со времен она, как минимум с одна тысяча девятьсот восемьдесят третьего года.
