Defect list size ?

Defect list size ?

[Jean Tourrilhes]

	Hi,

	What is a reasonable defect list size for an almost new disk
(3 weeks - 146 GB).
	scscinfo -d gives me :
--------------------------------------------
Data from Defect Lists
----------------------
3060 entries in manufacturer table.
...
[truncated]
--------------------------------------------
	Which is way more than my older and smaller disk. I'm
wondering if this is acceptable or if I have a bad disk.

	Thanks...

	Jean

Re: Defect list size ?

[Matt Domsch]

On Wed, Mar 16, 2005 at 11:47:09AM -0800, Jean Tourrilhes wrote:
> 	Hi,
> 
> 	What is a reasonable defect list size for an almost new disk
> (3 weeks - 146 GB).
> 	scscinfo -d gives me :
> --------------------------------------------
> Data from Defect Lists
> ----------------------
> 3060 entries in manufacturer table.
> ...
> [truncated]
> --------------------------------------------
> 	Which is way more than my older and smaller disk. I'm
> wondering if this is acceptable or if I have a bad disk.

306184192 sectors (give or take a few) on that disk.
     3060 sectors bad at low-level format time.

While it may feel like a large number, it really isn't for the size
disk you've got.

Now, if the number of "Grown" defects starts increasing, then yes, be
worried.

Thanks,
Matt

-- 
Matt Domsch
Software Architect
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

Re: Defect list size ?

[Jean Tourrilhes]

On Wed, Mar 16, 2005 at 01:56:25PM -0600, Matt Domsch wrote:
> On Wed, Mar 16, 2005 at 11:47:09AM -0800, Jean Tourrilhes wrote:
> > 	Hi,
> > 
> > 	What is a reasonable defect list size for an almost new disk
> > (3 weeks - 146 GB).
> > 	scscinfo -d gives me :
> > --------------------------------------------
> > Data from Defect Lists
> > ----------------------
> > 3060 entries in manufacturer table.
> > ...
> > [truncated]
> > --------------------------------------------
> > 	Which is way more than my older and smaller disk. I'm
> > wondering if this is acceptable or if I have a bad disk.
> 
> 306184192 sectors (give or take a few) on that disk.
>      3060 sectors bad at low-level format time.
> 
> While it may feel like a large number, it really isn't for the size
> disk you've got.
> 
> Now, if the number of "Grown" defects starts increasing, then yes, be
> worried.
> 
> Thanks,
> Matt

	Thanks very much for the quick answer. Yes, as you can see,
I'm used to much smaller disk and looking at all options about my
crashes (see other e-mail).
	Sorry for the trouble.

	Jean

RE: Defect list size ?

[Guy]

3060 seems low when you compare your disk's size to my 18 Gig disks!

I have 17 disks, 18 Gig each.

2112 entries (16896 bytes) in manufacturer table.
1902 entries (15216 bytes) in manufacturer table.
2048 entries (16384 bytes) in manufacturer table.
1304 entries (10432 bytes) in manufacturer table.
3461 entries (27688 bytes) in manufacturer table.
949 entries (7592 bytes) in manufacturer table.
1939 entries (15512 bytes) in manufacturer table.
2250 entries (18000 bytes) in manufacturer table.
1404 entries (11232 bytes) in manufacturer table.
2633 entries (21064 bytes) in manufacturer table.
1997 entries (15976 bytes) in manufacturer table.
1431 entries (11448 bytes) in manufacturer table.
1353 entries (10824 bytes) in manufacturer table.
1474 entries (11792 bytes) in manufacturer table.
1519 entries (12152 bytes) in manufacturer table.
1720 entries (13760 bytes) in manufacturer table.
1247 entries (9976 bytes) in manufacturer table.

My disks have been in use 24/7 for 1.5 years, some for 2.5 years.
My grown tables:
0 entries (0 bytes) in grown table.
0 entries (0 bytes) in grown table.
9 entries (72 bytes) in grown table.
5 entries (40 bytes) in grown table.
0 entries (0 bytes) in grown table.
12 entries (96 bytes) in grown table.
21 entries (168 bytes) in grown table.
0 entries (0 bytes) in grown table.
6 entries (48 bytes) in grown table.
0 entries (0 bytes) in grown table.
6 entries (48 bytes) in grown table.
29 entries (232 bytes) in grown table.
0 entries (0 bytes) in grown table.
2 entries (16 bytes) in grown table.
3 entries (24 bytes) in grown table.
4 entries (32 bytes) in grown table.
0 entries (0 bytes) in grown table.

Guy

-----Original Message-----
From: linux-scsi-owner@vger.kernel.org
[mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Jean Tourrilhes
Sent: Wednesday, March 16, 2005 2:47 PM
To: linux-scsi@vger.kernel.org
Subject: Defect list size ?

	Hi,

	What is a reasonable defect list size for an almost new disk
(3 weeks - 146 GB).
	scscinfo -d gives me :
--------------------------------------------
Data from Defect Lists
----------------------
3060 entries in manufacturer table.
...
[truncated]
--------------------------------------------
	Which is way more than my older and smaller disk. I'm
wondering if this is acceptable or if I have a bad disk.

	Thanks...

	Jean
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