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.whereNis 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