bin/148471: fdisk(8) prompts with negative partition size [regression]

[Daniel Feenberg]

The following reply was made to PR bin/148471; it has been noted by GNATS.

From: Daniel Feenberg <feenberg at nber.org>
To: Tom Couch <tom.couch.storage at gmail.com>
Cc: bug-followup at FreeBSD.org
Subject: Re: bin/148471: fdisk(8) prompts with negative partition size 
 [regression]
Date: Mon, 12 Jul 2010 15:37:50 -0400 (EDT)

 On Mon, 12 Jul 2010, Tom Couch wrote:
 
 > What is the drive model and serial number?
 
 They are  Samsung HD203WI. Here is the output of diskinfo:
 
    diskinfo -ctv /dev/da0
    /dev/da0
          512             # sectorsize
          1999988850688   # mediasize in bytes (1.8T)
          3906228224      # mediasize in sectors
          243151          # Cylinders according to firmware.
          255             # Heads according to firmware.
          63              # Sectors according to firmware.
          WZ402752F36918001E9B    # Disk ident.
 
 >
 > The 3ware 9500S controller will not support > 2TB drives.
 >
 
 OK, but this drive is south of 2TB.
 
 I subsequently newfs'ed the bare drive, and am testing the result now. It 
 appears to me that the filesystem is corrupted in some way, but I don't 
 have sufficient information yet to file another bug report. So far the 
 problems appear only after writing over 1 TB to the drive, which takes 
 many hours. (The problem seems to be that the filesize measured by wc does 
 not correspond to the filesize reported by ls or the space used by 
 reported by df).
 
 In any case, even if the 9500S-8 is providing bad data, it would seem 
 prudent for fdisk to do some range checking before suggesting a default 
 action that is physically impossible.
 
 Thank you
 Daniel Feenberg
 feenberg at nber.org
 
 > Tom Couch
 >