HEA: and MAX: values for BRU

From page 41 of the RSX-11M-PLUS 4.3 System Generation and Installation Guide, the following values are known-safe for the HEA: and MAX: flags when initializing a disk.

Device	MAX:	HEA:
RA60	24617	12308
RA70	34180	25593
RA80	14629	7314
RA81	54815	51699
RA82	65500	51699
RA90	65500	65495
RC25	3130	1565
RD31	2558	10236
RD32	5117	20471
RD52	3719	1859
RD53	8529	4264
RD54	19143	9571
RK07	3308	1654
RM0{2,3}	8099	4049
RM05	30781	25593
RM80	14923	7461
RP0{4,5}	10567	5283
RP06	20956	10478

Section 4.6.6 (page 85) of the November 1998 revision of RSX-11M/RSX-11S Release Notes contains guidance on how to determine appropriate values for disks of arbitrary size. I have paraphrased this information for the sake of brevity, if something is not clear please refer to the documentation itself.

To determine the maximum value for MAX:, follow these guidelines:

For disks up to 64MB in size, MAXIMUM FILES = ((N-(((N+4095.)/4096.)+9.))*127.)/258. where N is the size of your target disk
For disks from 64MB to 532MB, set MAX: to the number of blocks on disk divided by 16.
For disks larger than 532MB, set MAX: to 65500.

The value of HEA: is derived from the value of MAX:. In order to determine the maximum HEA: value for your disk, use the following guidelines:

MAX value ---------- disk size ---------- HEA value
<25588               ≤209MB               MAX/2
≥25588 ^ ≤51176      210-419MB            25593
≥51176 ^ ≤51693      420-423MB            25846
≥51693 ^ ≤65500      ≥423MB               51693