Y
yuko
Hi everybody
I know sdparm can set RTL "recovery time limit" (a thing like WD's "TLER")
Has anybody ever set it on an Hitachi SATA drive? (I'd have to do this
on a 7K1000 first edition not 7K1000.B)
http://www.hitachigst.com/tech/tech...007E985D/$file/DS_CS_7K1000.B_Spec_rev3.0.pdf
(this is for 7K1000.B, I couldn't find it for 7K1000)
at paragraph 9.21.3.2 there is written that recovery time limit is in
100ms units, while sdparm seems to use that exact same command but wants
milliseconds. Should I enter it as milliseconds?
Also, at the same paragraph and at paragraph 7.3 there is written the
minimum time limit is 6.5 seconds, but I don't understand if that's only
for the case of the drive spinning up (see para 7.3) or it's a global limit.
Another question: do you know the relationship between RTL and RRC (read
retry count)? is the lowest of the two that takes precedence? With an
RTL of 6.5 seconds I'd expect the drive to make thousands of read-retry
attempts!?
Another question: I have a 3ware controller that does not allow me to
use sdparm. I could use an USB to SATA converter... do you think it
would work? Does it depend on the controller integrated in the USB
converter? I tried on an old 3.5" Samsung 500GB of mine and it didn't
work, sdparm wasn't able to set the RTL or any other value that came to
my mind... was that the Samsung not supporting the Read-Write Error
Recovery Options or the USB controller not supporting them?
Another question: in
sdparm --enumerate --page=rw
options are like this:
RRC [0x03:7:8 ] Read retry count
RTL [0x0a:7:16] Recovery time limit (ms)
what does the stuff between the [ ] mean? What are the values 0x03 7 8
0x0a 7 16 ?
Sorry if these seem stupid questions like "just try, don't ask" but I'd
have to do this on the disks of a server full of important data...
Thank you for any knowledge
I know sdparm can set RTL "recovery time limit" (a thing like WD's "TLER")
Has anybody ever set it on an Hitachi SATA drive? (I'd have to do this
on a 7K1000 first edition not 7K1000.B)
http://www.hitachigst.com/tech/tech...007E985D/$file/DS_CS_7K1000.B_Spec_rev3.0.pdf
(this is for 7K1000.B, I couldn't find it for 7K1000)
at paragraph 9.21.3.2 there is written that recovery time limit is in
100ms units, while sdparm seems to use that exact same command but wants
milliseconds. Should I enter it as milliseconds?
Also, at the same paragraph and at paragraph 7.3 there is written the
minimum time limit is 6.5 seconds, but I don't understand if that's only
for the case of the drive spinning up (see para 7.3) or it's a global limit.
Another question: do you know the relationship between RTL and RRC (read
retry count)? is the lowest of the two that takes precedence? With an
RTL of 6.5 seconds I'd expect the drive to make thousands of read-retry
attempts!?
Another question: I have a 3ware controller that does not allow me to
use sdparm. I could use an USB to SATA converter... do you think it
would work? Does it depend on the controller integrated in the USB
converter? I tried on an old 3.5" Samsung 500GB of mine and it didn't
work, sdparm wasn't able to set the RTL or any other value that came to
my mind... was that the Samsung not supporting the Read-Write Error
Recovery Options or the USB controller not supporting them?
Another question: in
sdparm --enumerate --page=rw
options are like this:
RRC [0x03:7:8 ] Read retry count
RTL [0x0a:7:16] Recovery time limit (ms)
what does the stuff between the [ ] mean? What are the values 0x03 7 8
0x0a 7 16 ?
Sorry if these seem stupid questions like "just try, don't ask" but I'd
have to do this on the disks of a server full of important data...
Thank you for any knowledge