zsd@PIG.DREA.DND.CA (Jim Diamond) (02/06/90)
We have a 4D/50 GTB running 3.2. Due to lack of disk space, we are
testing out a second disk drive, but I have a few concerns which I hope
some kind soul can help me out with. (Yes, I would have rather just
bought a drive from SGI, but by plugging in my own I can save about
$9000 or $10,000. I realize that the extra money goes toward the support
of such questions, but I don't have that sort of money. Nuff said?)
Basically, my concerns fall into 3 categories:
1) Are the default drive parameters below correct for a
CDC Wren V disk (model 94181-702)?
In particular, should I set it to
(a) transfer bad blocks;
(b) do auto reallocation of bad blocks
(c) enable drive read-ahead
and are the read- and write-buffer ratios appropriate?
Are the tracks/zone and alternate sectors/zone reasonable?
2) How many cylinders at the end should I not allocate to file systems?
The SGI disk (apparently) uses 25 cylinders, which strikes me as
excessive. On the other hand, I must admit to a lack of knowledge
of SCSI disks.
3) When 4Sight fires up, it complains CIO: dks0d2s10 volume header not valid
(see below). Should I worry about this? If so, how do I fix it?
I realize there are a lot of questions here, but any light that anyone
could shed on even a subset of these questions would be most appreciated.
Thanks.
Jim Diamond
zsd@pig.drea.dnd.ca
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Here's the parameters for the SGI-supplied system disk.
# fx
fx version 1.2; Sat Aug 19 11:05:46 PDT 1989
fx: "device-name" = (dksc)
fx: ctlr# = (0)
fx: drive# = (1)
...opening dksc(0,1,)
...controller test...OK
Scsi drive type == TOSHIBA MK156FB
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fx/label/show> 6
----- current drive parameters -----
Error correction enabled Enable data transfer on error
Don't report recovered errors Do delay for error recovery
Do transfer bad blocks Do auto reallocation of bad blocks
Err retry count = 27 Tracks/zone = 8270 Sect/track = 36
Alt sect/zone = 1 Interleave = 1 Cylinders = 827
Alt track/volume = 20 Cylinder skew = 10 Heads = 10
Alt track/zone = 20 Track skew = 0 Data bytes/sect = 578
Cert Pattern = 14799
----- partitions -----
part type base+size (sectors)
0: efs 6+91 (32760) 6: efs 297+505 (181800)
1: rawdata 97+200 (72000) 7: efs 6+796 (286560)
2: efs 297+505 (181800) 8: volhdr 0+6 (2160)
5: efs 297+505 (181800) 10: entire 0+802 (288720)
----- bootinfo -----
root partition = 0 swap partition = 1 bootfile = /unix
----- directory entries -----
0: sgilabel block 360 size 280 4: ktbl_us block 367 size 1024
1: ktbl_de block 361 size 1024 5: sash block 369 size 175104
2: ktbl_fr block 363 size 1024 6: symmon block 1214 size 50176
3: ktbl_uk block 365 size 1024
----- sgi-info -----
serial = 0000 name = TOSHIBA MK156FB
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And here's what I have for the new disk.
# fx
fx version 1.2; Sat Aug 19 11:05:46 PDT 1989
fx: "device-name" = (dksc)
fx: ctlr# = (0)
fx: drive# = (1) 2
...opening dksc(0,2,)
...controller test...OK
Scsi drive type == CDC 94181-15
.
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fx/label/show> 6
----- current drive parameters -----
Error correction enabled Enable data transfer on error
Don't report recovered errors Do delay for error recovery
Don't transfer bad blocks Don't auto reallocation of bad blocks
Drive read-ahead disabled
Read buffer ratio 4/256 Write buffer ratio 4/256
Err retry count = 27 Tracks/zone = 1 Sect/track = 52
Alt sect/zone = 1 Interleave = 1 Cylinders = 1546
Alt track/volume = 30 Cylinder skew = 19 Heads = 15
Alt track/zone = 0 Track skew = 2 Data bytes/sect = 512
Cert Pattern = 0
----- partitions -----
part type base+size (sectors)
0: efs 4+42 (32130) 5: efs 923+611 (467415)
1: rawdata 46+133 (101745) 6: efs 179+1355 (1036575)
2: efs 4+131 (100215) 7: efs 4+1530 (1170450)
3: efs 135+394 (301410) 8: volhdr 0+4 (3060)
4: efs 529+394 (301410) 10: entire 0+1534 (1173510)
----- bootinfo -----
root partition = 0 swap partition = 1 bootfile = /unix
----- directory entries -----
0: sgilabel block 1 size 280
----- sgi-info -----
serial = 083316 name = CDC 94181-702
----- please choose one of -----
1) parameters/ 3) sgiinfo 5) directory
2) partitions 4) bootinfo 6) all
fx/label/show> ..
----- please choose one of -----
1) readin/ 2) show/
fx/label> ..
----- please choose one of -----
1) exit 2) badblock/ 3) debug/ 4) exercise/ 5) label/
fx> 1
----------------------------------------------------------------------
Here's 4Sight's complaints about the new disk.
# tail -30 /usr/adm/SYS*
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Feb 6 07:43:36 hog grcond[2323]: CIO:
Feb 6 07:43:36 hog grcond[2323]: CIO: IRIX System V Release 3.2 IP4 Version 08231838
Feb 6 07:43:36 hog grcond[2323]: CIO:
Feb 6 07:43:36 hog grcond[2323]: CIO: root on dev 0x1620, swap on dev 0x1621
Feb 6 07:43:36 hog grcond[2323]: CIO: dks0d2s10 volume header not valid
Feb 6 07:43:36 hog grcond[2323]: CIO:
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